Please look in Eschmeyer's Catalog of Fishes for authorships of sections, Families of Fishes (all), and related information.

Genera in the family or subfamily Loricariidae: [ 169 ] records

Acanthicus Agassiz [L.] in Spix & Agassiz 1829:2 Masc. Acanthicus hystrix Spix & Agassiz 1829. Type by monotypy. Authorship follows that suggested by Kottelat 1988:78 [ref. 13380]. •Valid as Acanthicus Agassiz 1829 -- (Isbrücker 1980:75 [ref. 2303], Isbrücker & Nijssen 1988 [ref. 7320], Burgess 1989:437 [ref. 12860], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:11 [ref. 27178], Ferraris 2003:865 [ref. 26999], Fisch-Muller in Reis et al. 2003:373 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:218 [ref. 29155] with authorship as Spix & Agassiz, Lujan et al. 2014:15 [ref. 32454] as Acanthicus clade, Chamon 2016:396 [ref. 34326]). Current status: Valid as Acanthicus Agassiz 1829. Loricariidae: Hypostominae.

Acanthodemus Marschall [A. F. Graf von] (ex Castelnau) 1873:63 Masc. Hypostomus aurantiacus Castelnau 1855. Type by subsequent designation. Appeared first in French only as "Acanthodémes" in Castelnau 1855:43 [ref. 766] as a subgroup of Hypostomus; latinized by Marschall 1873:63 as above. Earliest type designation found is by Jordan 1919:264 [ref. 2410]; technical first addition of species not researched. •Synonym of Parancistrus Bleeker 1862 -- (Isbrücker 2002:11 [ref. 27178], Fisch-Muller in Reis et al. 2003:391 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:278 [ref. 29155]). Current status: Synonym of Parancistrus Bleeker 1862. Loricariidae: Hypostominae.

Acestra Kner [R.] 1853:93 Fem. Acestra acus Kner 1853. Type by subsequent designation. Type designated by Bleeker 1862:4 [ref. 393] and 1863:82 [ref. 401]. Objectively invalid; preoccupied by Acestra Bonaparte 1846 in fishes and by Dallas 1852 in Hemiptera; replaced by Farlowella Eigenmann & Eigenmann 1889. •Synonym of Farlowella Eigenmann & Eigenmann 1889 -- (Isbrücker 1980:96 [ref. 2303], Retzer & Page 1997:35 [ref. 23176], Isbrücker 2002:11 [ref. 27178], Ferraris in Reis et al. 2003:332 [ref. 27061], Ferraris 2007:237 [ref. 29155], Londoño-Burbano & Reis 2021:S1 [ref. 38183]). 1°Homonym. Current status: Synonym of Farlowella Eigenmann & Eigenmann 1889. Loricariidae: Loricariinae.

Acestridium Haseman [J. D.] 1911:319 Neut. Acestridium discus Haseman 1911. Type by monotypy. •Valid as Acestridium Haseman 1911 -- (Isbrücker 1980:102 [ref. 2303], Burgess 1989:441 [ref. 12860], Schaefer 1996:925 [ref. 22565], Schaefer 1997:41 [ref. 23213], Schaefer & Provenzano 1998:224 [ref. 23317], Schaefer 1991:2 [ref. 18926], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Retzer et al. 1999:315 [ref. 24231], Isbrücker 2002:11 [ref. 27178], Schaefer in Reis et al. 2003:321 [ref. 27061], Retzer 2005:1 [ref. 28228], Ferraris 2007:218 [ref. 29155], Rodriguez & Reis 2007:429 [ref. 29464], Carvalho et al. 2008:336 [ref. 29839], Reis & Lehmann A. 2009:446 [ref. 30379], Martins & Langeani 2011:66 [ref. 31235], Rodriguez et al. 2015:325, 335 [ref. 33908], Delapieve et al. 2018:21 [ref. 35713]). Current status: Valid as Acestridium Haseman 1911. Loricariidae: Hypoptopomatinae.

Ancistomus Isbrücker [I. J. H.] & Seidel [I.] in Isbrücker et al. 2001:17 Masc. Ancistrus snethlageae Steindachner 1911. Type by original designation (also monotypic). •Synonym of Hemiancistrus Bleeker 1862 -- (Armbruster 2004:53, 59 [ref. 27644]). •Synonym of Peckoltia Miranda Ribeiro 1912 -- (Fisch-Muller in Reis et al. 2003:392 [ref. 27061], Ferraris 2007:283 [ref. 29155], de Oliveira et al. 2012:552 [ref. 32202]). •Valid as Ancistomus Isbrücker & Seidel 2001 -- (Armbruster et al. 2015:99 [ref. 33670]). Current status: Valid as Ancistomus Isbrücker & Seidel 2001. Loricariidae: Hypostominae.

Ancistrus Kner [R.] 1854:272 Masc. Hypostomus cirrhosus Valenciennes 1836. Type by subsequent designation. Type designated by Bleeker 1862:2 [ref. 393]. •Valid as Ancistrus Kner 1854 -- (Isbrücker 1980:65 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Reis 1987:81 [ref. 6263], Burgess 1989:436 [ref. 12860], Muller 1989 [ref. 13512], Malabarba 1989:148 [ref. 14217], Muller et al. 1994 [ref. 21571], Montoya-Burgos et al. 1997:185 [ref. 22785], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:134 [ref. 24147], Sabaj et al. 1999:217 [ref. 24242], Isbrücker 2002:11 [ref. 27178], Fisch-Muller in Reis et al. 2003:373 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Fisch-Muller et al. 2005:559 [ref. 28242], Fisch-Muller et al. 2005:525 [ref. 28561], Proudlove 2006:151 [ref. 28992], Geerinckx et al. 2007:47 [ref. 29179], Ferraris 2007:219 [ref. 29155], Bifi et al. 2009:41 [ref. 30541], Taphorn et al. 2010:21 [ref. 30697], Lujan & Birindelli 2011:44 [ref. 31408], Taphorn et al. 2013:343 [ref. 32678], de Oliveira et al. 2015:73 [ref. 33869], de Oliveira et al. 2016:68 [ref. 34368], Bertaco et al. 2016:417 [ref. 34561], Prizon et al. 2016:625 [ref. 34931], Provenzano & Barriga-Salazar 2018:211 [ref. 36344], de Souza et al. 2019:1 [ref. 36504], Bifi et al. 2019:1 [ref. 36821], Bifi & Ortega 2020:1 [ref. 37454], Neuhaus et al. 2022:1 [ref. 39129], Neuhaus et al. 2023:1 [ref. 40715], Widholzer et al. 2024:1 [ref. 40848]). Current status: Valid as Ancistrus Kner 1854. Loricariidae: Hypostominae.

Andeancistrus Lujan [N. K.], Meza-Vargas [V.] & Barriga Salazar [R. E.] 2015:652 Masc. Chaetostomus platycephalus Boulenger 1898. Type by original designation. •Valid as Andeancistrus Lujan, Meza-Vargas & Barriga Salazar 2015 -- (Provenzano 2018:408 [ref. 35789]). Current status: Valid as Andeancistrus Lujan, Meza-Vargas & Barriga Salazar 2015. Loricariidae: Hypostominae.

Aphanotorulus Isbrücker [I. J. H.] & Nijssen [H.] 1983:105 Masc. Aphanotorulus frankei Isbrücker & Nijssen 1983. Type by original designation (also monotypic). •Synonym of Hypostomus Lacepède 1803 -- (Armbruster 2004:53, 60 [ref. 27644] dated 1982). •Valid as Aphanotorulus Isbrücker & Nijssen 1983 -- (Burgess 1989:430 [ref. 12860], Armbruster & Page 1996:381 [ref. 22151], Armbruster 1998:253 [ref. 23319], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:12 [ref. 27178], Weber in Reis et al. 2003:351 [ref. 27061], Ferraris 2007:225 [ref. 29155], Weber et al. 2012:219 [ref. 31999], Ray & Armbruster 2016:507 [ref. 34178], Oliveira et al. 2017:[1] [ref. 35225]). Current status: Valid as Aphanotorulus Isbrücker & Nijssen 1983. Loricariidae: Hypostominae.

Apistoloricaria Isbrücker [I. J. H.] & Nijssen [H.] 1986:103 Fem. Apistoloricaria condei Isbrücker & Nijssen 1986. Type by original designation (also monotypic). •Valid as Apistoloricaria Isbrücker & Nijssen 1986 -- (Nijssen & Isbrücker 1988 [ref. 7322], Burgess 1989:444 [ref. 12860], Isbrücker 2002:13 [ref. 27178], Ferraris in Reis et al. 2003:330 [ref. 27061], Covain & Fisch-Muller 2007:26 [ref. 29329], Ferraris 2007:226 [ref. 29155], Provenzano-Rizzi & Barriga-Salazar 2020:497 [ref. 37527]). •Synonym of Rhadinoloricaria Isbrücker & Nijssen 1974 -- (Covain et al. 2015:513 [22] [ref. 34066]). Current status: Synonym of Rhadinoloricaria Isbrücker & Nijssen 1974. Loricariidae: Loricariinae.

Aposturisoma Isbrücker [I. J. H.], Britski [H. A.], Nijssen [H.] & Ortega [H.] 1983:34 Neut. Aposturisoma myriodon Isbrücker, Britski, Nijssen & Ortega 1983. Type by original designation (also monotypic). •Valid as Aposturisoma Isbrücker, Britski, Nijssen & Ortega 1983 -- (Burgess 1989:440 [ref. 12860], Isbrücker 2002:13 [ref. 27178], Ferraris in Reis et al. 2003:330 [ref. 27061], Covain & Fisch-Muller 2007:27 [ref. 29329], Ferraris 2007:226 [ref. 29155]). •Possibly a synonym of Farlowella Eigenmann & Eigenmann 1889 -- (Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). •Synonym of Farlowella Eigenmann & Eigenmann 1889 -- (Londoño-Burbano & Reis 2021:56 [ref. 38183]). Current status: Synonym of Farlowella Eigenmann & Eigenmann 1889. Loricariidae: Loricariinae.

Araichthys Zawadzki [C. H.], Bifi [A. G.] & Mariotto [S.] 2016:362 Masc. Araichthys loro Zawadzki, Bifi & Mariotto 2016. Type by original designation (also monotypic). •Valid as Araichthys Zawadzki, Bifi & Mariotto 2016. Current status: Valid as Araichthys Zawadzki, Bifi & Mariotto 2016. Loricariidae: Hypostominae.

Aristommata Holmberg [E. L.] 1893:96 Fem. Aristommata inexspectata Holmberg 1893. Type by monotypy. Misspelled Aristomata by Eigenmann 1910:412 [ref. 1224]. •Valid as Aristommata Holmberg 1893 -- (Isbrücker 1980:87 [ref. 2303]). •Synonym of Hypoptopoma Günther 1868 -- (Schaefer 1991:2 [ref. 18926] as Arstommata, Aquino & Miquelarena 2001:2 [ref. 26083], Isbrücker 2002:13 [ref. 27178], Ferraris 2007:249 [ref. 29155], Aquino & Schaefer 2010:7 [ref. 30875], Delapieve et al. 2018:22 [ref. 35713]). Current status: Synonym of Hypoptopoma Günther 1868. Loricariidae: Hypoptopomatinae.

Avalithoxus Lujan [N. K.], Armbruster [J. W.] & Lovejoy [N. R.] 2018:[10] Masc. Lithoxus jantjae Lujan 2008. Type by original designation (and monotypic). •Valid as Avalithoxus Lujan, Armbruster & Lovejoy 2018. Current status: Valid as Avalithoxus Lujan, Armbruster & Lovejoy 2018. Loricariidae: Hypostominae.

Baryancistrus Rapp Py-Daniel [L. H.] 1989:245 Masc. Hypostomus niveatus Castelnau 1855. Type by original designation (also monotypic, one species mentioned). Both new genera in this work were proposed as (p. 235), "...herein preliminary established." Regarded as available, not falling under Art. 15.1 (taxa proposed conditionally after 1961 are unavailable; see Appendix A in Eschmeyer 1990 [ref. 20647]). •Valid as Baryancistrus Rapp Py-Daniel 1989 -- (Burgess & Finley 1996:168 [ref. 22901], Isbrücker 2002:13 [ref. 27178], Fisch-Muller in Reis et al. 2003:379 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Werneke et al. 2005:533 [ref. 28457], Ferraris 2007:226 [ref. 29155], Lujan et al. 2009:50 [ref. 30056], Rapp Py-Daniel et al. 2011:241[ref. 31383], de Oliveira et al. 2019:481 [ref. 36981]). Current status: Valid as Baryancistrus Rapp Py-Daniel 1989. Loricariidae: Hypostominae.

Brochiloricaria Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:87, 90 Fem. Brochiloricaria chauliodon Isbrücker 1979. Type by original designation. •Valid as Brochiloricaria Isbrücker & Nijssen 1979 -- (Isbrücker 1980:119 [ref. 2303], Isbrücker 1981:56 [ref. 5522], Burgess 1989:443 [ref. 12860], Britski et al. 1999:132 [ref. 24147] as Brachyloricaria, Isbrücker 2002:13 [ref. 27178], Ferraris in Reis et al. 2003:331 [ref. 27061], Covain & Fisch-Muller 2007:27 [ref. 29329], Ferraris 2007:227 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Bertaco et al. 2016:417 [ref. 34561]). Current status: Valid as Brochiloricaria Isbrücker & Nijssen 1979. Loricariidae: Loricariinae.

Canthopomus Eigenmann [C. H.] 1910:404, 407 Fem. Rinelepis genibarbis Valenciennes 1840. Type by original designation. Description in key (p. 404). We regard this as the original description, not Eigenmann & Allen 1942:183 [ref. 1246] (with different type, Rhinelepis agassizii Steindachner). •Objective synonym of Pseudorinelepis Bleeker 1862 -- (Isbrücker 1980:8 [ref. 2303], Armbruster & Hardman 1999:56 [ref. 23670], Isbrücker 2002:13 [ref. 27178], Weber in Reis et al. 2003:366 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:289 [ref. 29155]). Current status: Synonym of Pseudorinelepis Bleeker 1862. Loricariidae: Rhinelepinae.

Canthopomus Eigenmann [C. H.] & Allen [W. R.] 1942:182 Masc. Rhinelepis agassizii Steindachner 1877. Type by original designation. Objectively invalid; preoccupied by Canthopomus Eigenmann 1910 (which Eigenmann & Allen considered a nomen nudum). •In the synonymy of Pseudorinelepis Bleeker 1862. 1°Homonym. Current status: Synonym of Pseudorinelepis Bleeker 1862. Loricariidae: Rhinelepinae.

Carinotus (subgenus of Plecostomus) LaMonte [F. R.] 1933:1 Masc. Plecostomus (Carinotus) carinotus LaMonte 1933. Type by original designation (also by monotypy and absolute tautonymy). •Synonym of Delturus Eigenmann & Eigenmann 1889 -- (Isbrücker 1980:9 [ref. 2303], Isbrücker 2002:13 [ref. 27178], Weber in Reis et al. 2003:352 [ref. 27061], Ferraris 2007:234 [ref. 29155]). Current status: Synonym of Delturus Eigenmann & Eigenmann 1889. Loricariidae: Delturinae.

Chaetostoma Tschudi [J. J. von] 1846:25 Neut. Chaetostoma loborhynchos Tschudi 1846. Type by monotypy. Authorship from Fowler (MS), sometimes attributed to Heckel. Spelled Chaetostomus by Heckel in Kner 1854:(256) 271 [ref. 2628] and others. •Valid as Chaetostoma Tschudi 1846 -- (Isbrücker 1980:59 [ref. 2303], Burgess 1989:435 [ref. 12860], Rapp Py-Daniel 1991:239 [ref. 13586], Ceas & Page 1996:671 [ref. 22228], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:13 [ref. 27178], Fisch-Muller in Reis et al. 2003:379 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644] dated 1845, Salcedo 2006:60 [ref. 28542], Salcedo 2006:207 [ref. 28842], Ferraris 2007:227 [ref. 29155], Ballen 2011:383 [ref. 31653], Salcedo et al. 2011:503 [ref. 31722], Tan & Armbruster 2012:52 [ref. 31842], Salcedo 2013:468 [ref. 32670], Ardila Rodríquez 2013:[3] [ref. 33712], Lujan et al. 2014:16 [ref. 33495] as Chaetostoma clade, Ballen et al. 2016:181 [ref. 34396], Provenzano 2018:407 [ref. 35789], Urbano-Bonilla & Ballen 2021:1 [ref. 38058], Meza-Vargas et al. 2022:364 [ref. 39368]). Current status: Valid as Chaetostoma Tschudi 1846. Loricariidae: Hypostominae.

Chauliocheilos Martins [F. de O.], Andrade [B. N.], Rosa [A. C.] & Langeani [F.] 2014:194 Masc. Chauliocheilos saxatilis Martins, Andrade, Rosa & Langeani 2014. Type by original designation (also monotypic). •Valid as Chauliocheilos Martins, Andrade, Rosa & Langeani 2014. Current status: Valid as Chauliocheilos Martins, Andrade, Rosa & Langeani 2014. Loricariidae: Hypoptopomatinae.

Cheilonimata Provenzano [F.] 2023:317 Fem. Cheilonimata minuta Provenzano 2023. Type by original designation. •Valid as Cheilonimata Provenzano 2023. Current status: Valid as Cheilonimata Provenzano 2023. Loricariidae: Loricariinae.

Cheiridodus Eigenmann [C. H.] 1922:(66) 70 Masc. Plecostomus hondae Regan 1912. Type by original designation (also monotypic). Misspelled Cheirododus by Jordan 1923:153 [ref. 2421]. •Synonym of Cochliodon Heckel 1854 -- (Isbrücker 1980:38 [ref. 2303], Isbrücker 2002:14 [ref. 27178]). •Synonym of Hypostomus Lacepède 1803 -- (Weber & Montoya-Burgos 2002:365 [ref. 26428], Weber in Reis et al. 2003:355 [ref. 27061], Armbruster 2004:53, 60 [ref. 27644], Ferraris 2007:250 [ref. 29155]). Current status: Synonym of Hypostomus Lacepède 1803. Loricariidae: Hypostominae.

Cochliodon Heckel [J. J.] in Kner 1854:255, 265 Masc. Hypostomus cochliodon Kner 1854. Type by monotypy (also by absolute tautonymy). First published in synonymy, adopted by Günther 1864:231 [ref. 1974] as a valid subgroup in Plecostomus with one species, thereby validating the genus from Heckel 1854. •Valid as Cochliodon Heckel 1854 -- (Isbrücker 1980:38 [ref. 2303], Lilyestrom 1984:41 [ref. 23620], Burgess 1989:433 [ref. 12860], López & Miquelarena 1991:10 [ref. 23548], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:135 [ref. 24147], Isbrücker 2002:14 [ref. 27178], Lujan et al. 2017:[16] [ref. 35031]). •Synonym of Hypostomus Lacepède 1803 -- (Weber & Montoya-Burgos 2002:365 [ref. 26428], Weber in Reis et al. 2003:355 [ref. 27061], Armbruster 2003:4 [ref. 27426], Armbruster 2004:53, 60 [ref. 27644], Ferraris 2007:250 [ref. 29155]). Current status: Synonym of Hypostomus Lacepède 1803. Loricariidae: Hypostominae.

Cordylancistrus Isbrücker [I. J. H.] 1980:48 Masc. Pseudancistrus torbesensis Schultz 1944. Type by original designation (also monotypic). •Valid as Cordylancistrus Isbrücker 1980 -- (Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:434 [ref. 12860], Pérez & Provenzano 1996:27 [ref. 22807], Burgess & Finley 1996:168 [ref. 22901], Isbrücker 2002:14 [ref. 27178], Fisch-Muller in Reis et al. 2003:383 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Provenzano & Milani 2006:29 [ref. 28579], Ferraris 2007:231 [ref. 29155], Tan & Armbruster 2012:52 [ref. 31842], Salcedo 2013:468 [ref. 32670], Provenzano & Villa-Navarro 2017:522 [ref. 35473], Provenzano et al. 2017:256 [ref. 35613], Provenzano 2018:398 [ref. 35789]). Current status: Valid as Cordylancistrus Isbrücker 1980. Loricariidae: Hypostominae.

Corumbataia Britski [H. A.] 1997:233 Fem. Corumbataia cuestae Britski 1997. Type by original designation. •Valid as Corumbataia Britski 1997 -- (Isbrücker 2002:15 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Ferreira & Ribeiro 2007:59 [ref. 28908], Ferraris 2007:232 [ref. 29155], Carvalho 2008:552 [ref. 29798], Silva et al. 2018:317 [ref. 36151], Thimotheo et al. 2020:1 [ref. 38000]). Current status: Valid as Corumbataia Britski 1997. Loricariidae: Hypoptopomatinae.

Corymbophanes Eigenmann [C. H.] 1909:5 Masc. Corymbophanes andersoni Eigenmann 1909. Type by monotypy. Gender ambiguous, treated as masculine. •Valid as Corymbophanes Eigenmann 1909 -- (Isbrücker 1980:14 [ref. 2303], Burgess 1989:430 [ref. 12860], Armbruster et al. 2000:997 [ref. 25018], Isbrücker 2002:15 [ref. 27178], Weber in Reis et al. 2003:352 [ref. 27061], Armbruster 2004:53 [ref. 27644], Ferraris 2007:232 [ref. 29155], Lujan et al. 2019:1 [ref. 37035]). Current status: Valid as Corymbophanes Eigenmann 1909. Loricariidae: Hypostominae.

Crossoloricaria Isbrücker [I. J. H.] 1979:87, 90 Fem. Loricaria variegata Steindachner 1879. Type by original designation. •Valid as Crossoloricaria Isbrücker 1979 -- (Isbrücker 1980:120 [ref. 2303], Isbrücker & Nijssen 1986:103 [ref. 5212], Isbrücker & Nijssen 1986:40 [ref. 7321], Burgess 1989:444 [ref. 12860], Chang & Castro 1999:81 [ref. 23673], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:331 [ref. 27061], Covain & Fisch-Muller 2007:27 [ref. 29329], Ferraris 2007:232 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] restricted to trans-Andean species in Loricariini). Current status: Valid as Crossoloricaria Isbrücker 1979. Loricariidae: Loricariinae.

Cryptancistrus Fisch-Muller [S.], Mol [J. H. A.] & Covain [R.] 2018:50 Masc. Cryptancistrus similis Fisch-Muller, Mol & Covain 2018. Type by original designation (and monotypy). •Valid as Cryptancistrus Fisch-Muller, Mol & Covain 2018. Current status: Valid as Cryptancistrus Fisch-Muller, Mol & Covain 2018. Loricariidae: Hypostominae.

Cteniloricaria Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:88, 91 Fem. Loricaria platystoma Günther 1868. Type by original designation. •Synonym of Harttia Steindachner 1876 -- (Rapp Py-Daniel & Oliveira 2001:81 [ref. 25404]). •Valid as Cteniloricaria Isbrücker & Nijssen 1979 -- (Isbrücker 1980:90 [ref. 2303], Burgess 1989:439 [ref. 12860], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:331 [ref. 27061], Ferraris 2007:233 [ref. 29155]). •Questionably a synonym of Harttia Steindachner 1877 -- (Covain & Fisch-Muller 2007:29 [ref. 29329], Covain et al. 2012:132 [ref. 32000]). •Valid as Cteniloricaria Isbrcker & Nijssen 1979 -- (Covain et al. 2012:158 [ref. 32000], Covain et al. 2015:513 [22] [ref. 34066] in Harttiini, Londoño-Burbano & Reis 2021:58 [ref. 38183]). Current status: Valid as Cteniloricaria Isbrücker & Nijssen 1979. Loricariidae: Loricariinae.

Curculionichthys Roxo [F. F.], Silva [G. S. C.], Ochoa [L. E.] & Oliveira [C.] 2015:105 Masc. Hisonotus insperatus Britski & Garavello 2003. Type by original designation. •Valid as Curculionichthys Roxo, Silva, Ochoa & Oliveira 2015 -- (Silva et al. 2016:281 [ref. 34828], Roxo et al. 2017:258 [ref. 35655], Calegari et al. 2018:663 [ref. 36345], Gamarra et al. 2019:1 [ref. 36703], Morais et al. 2024:60 [ref. 40866]). Current status: Valid as Curculionichthys Roxo, Silva, Ochoa & Oliveira 2015. Loricariidae: Hypoptopomatinae.

Dasyloricaria Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:87, 90 Fem. Loricaria filamentosa Steindachner 1878. Type by original designation. •Valid as Dasyloricaria Isbrücker & Nijssen 1979 -- (Isbrücker 1980:111 [ref. 2303], Burgess 1989:443 [ref. 12860], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:331 [ref. 27061], Covain & Fisch-Muller 2007:28 [ref. 29329], Ferraris 2007:233 [ref. 29155], Rodriguez et al. 2011:882 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Londoño-Burbano & Reis 2016:[3] [ref. 34381]). Current status: Valid as Dasyloricaria Isbrücker & Nijssen 1979. Loricariidae: Loricariinae.

Dekeyseria Rapp Py-Daniel [L. H.] 1985:178 Fem. Dekeyseria amazonica Rapp Py-Daniel 1985. Type by original designation. •Valid as Dekeyseria Rapp Py-Daniel 1985 -- (Burgess & Finley 1996:168 [ref. 22901], Fisch-Muller in Reis et al. 2003:383 [ref. 27061], Isbrücker 2002:15 [ref. 27178], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:234 [ref. 29155], Lujan & Birindelli 2011:44 [ref. 31408], Silva & Rapp Py-Daniel 2018:[1] [ref. 35865]). Current status: Valid as Dekeyseria Rapp Py-Daniel 1985. Loricariidae: Hypostominae.

Delturus Eigenmann [C. H.] & Eigenmann [R. S.] 1889:45 Masc. Delturus parahybae Eigenmann & Eigenmann 1889. Type by original designation. Armbruster 2004:45 [ref. 27644] treats Delturus and Upsilodus as an undescribed subfamily; the subfamily Delturinae Armbruster, Reis & Pereira was established in Reis et al. 2006:279 [ref. 28706]. •Valid as Delturus Eigenmann & Eigenmann 1889 -- (Isbrücker 1980:9 [ref. 2303], Burgess 1989:429 [ref. 12860], Isbrücker 2002:15 [ref. 27178], Weber in Reis et al. 2003:352 [ref. 27061], Armbruster 2004:45 [ref. 27644], Reis et al. 2006:286 [ref. 28706], Ferraris 2007:234 [ref. 29155]). Current status: Valid as Delturus Eigenmann & Eigenmann 1889. Loricariidae: Delturinae.

Dentectus Martín Salazar [F. J.], Isbrücker [I. J. H.] & Nijssen [H.] 1982:127 Masc. Dentectus barbarmatus Martín Salazar, Isbrücker & Nijssen 1982. Type by original designation (also monotypic). •Valid as Dentectus Martín Salazar, Isbrücker & Nijssen 1982 -- (Isbrücker & Nijssen 1986:103 [ref. 5212], Isbrücker & Nijssen 1986:40 [ref. 7321], Burgess 1989:444 [ref. 12860], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:332 [ref. 27061], Covain & Fisch-Muller 2007:28 [ref. 29329], Ferraris 2007:235 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Dentectus Martín Salazar, Isbrücker & Nijssen 1982. Loricariidae: Loricariinae.

Diapeltoplites (subgenus of Hypoptopoma) Fowler [H. W.] 1915:237 Masc. Hypoptopoma gulare Cope 1878. Type by original designation. Misspelled Diapaletoplites in Zoological Record for 1915 and in Jordan 1920:556 [ref. 4905]. •Synonym of Hypoptopoma Günther 1868 -- (Isbrücker 1980:87 [ref. 2303], Isbrücker 2002:15 [ref. 27178], Ferraris 2007:249 [ref. 29155], Aquino & Schaefer 2010:7 [ref. 30875], Delapieve et al. 2018:22 [ref. 35713]). Current status: Synonym of Hypoptopoma Günther 1868. Loricariidae: Hypoptopomatinae.

Dolichancistrus Isbrücker [I. J. H.] 1980:47 Masc. Pseudancistrus pediculatus Eigenmann 1918. Type by original designation. •Valid as Dolichancistrus Isbrücker 1980 -- (Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:434 [ref. 12860], Isbrücker 2002:15 [ref. 27178], Fisch-Muller in Reis et al. 2003:384 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:235 [ref. 29155], Ballen & Vari 2012:499, 501 [ref. 32204], Salcedo 2013:468 [ref. 32670], Provenzano 2018:407 [ref. 35789]). Current status: Valid as Dolichancistrus Isbrücker 1980. Loricariidae: Hypostominae.

Epactionotus Reis [R. E.] & Schaefer [S. A.] 1998:4 Masc. Epactionotus bilineatus Reis & Schaefer 1998. Type by original designation. •Synonym of Hisonotus Eigenmann & Eigenmann 1889 -- (Roxo et al. 2019:161 [ref. 36538]). •Valid as Epactionotus Leis & Schaefer 1998 -- (Isbrücker 2002:15 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Azpelicueta et al. 2004:89 [ref. 28029], Ferraris 2007:235 [ref. 29155],, Martins & Langeani 2011:66 [ref. 31235], Reis et al. 2012:10 [ref. 31863], Bertaco et al. 2016:417 [ref. 34561], Delapieve et al. 2020:[1] [ref. 37840]). Current status: Valid as Epactionotus Reis & Schaefer 1998. Loricariidae: Hypoptopomatinae.

Etsaputu Lujan [N. K.], Armbruster [J. W.] & Rengifo [B.] 2011:497 Neut. Etsaputu relictum Lujan, Armbruster & Rengifo 2011. Type by original designation (also monotypic). Stated by authors as neuter. •Synonym of Peckoltia Miranda Ribeiro 1912 -- (Ambruster & Lujan 2016:117 [ref. 34264]). Current status: Synonym of Peckoltia Miranda Ribeiro 1912. Loricariidae: Hypostominae.

Euacanthagenys Fowler [H. W.] 1945:123 Fem. Loricaria caquetae Fowler 1943. Type by original designation (also monotypic). •Synonym of Spatuloricaria Schultz 1944 -- (Isbrücker 1980:112 [ref. 2303], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:344 [ref. 27061], Ferraris 2007:296 [ref. 29155]). Current status: Synonym of Spatuloricaria Schultz 1944. Loricariidae: Loricariinae.

Eurycheilichthys Reis [R. E.] & Schaefer [S. A.] 1993:894 Masc. Eurycheilus pantherinus Reis & Schaefer 1992. Type by being a replacement name. Replacement for Eurycheilus Reis & Schaefer 1992, preoccupied by Eurycheilus Septfontaine 1970 in fossil cephalopods. •Synonym of Hisonotus Eigenmann & Eigenmann 1889 -- (Roxo et al. 2019:161 [ref. 36538]). •Valid as Eurycheilichthys Reis & Schaefer 1993 -- (Burgess & Finley 1996:169 [ref. 22901], Schaefer 1997:41 [ref. 23213], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], Isbrücker 2002:15 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Ferraris 2007:236 [ref. 29155], Carvalho et al. 2008:336 [ref. 29839], Reis et al. 2012:10 [ref. 31863], Azpelicueta & Koerber 2014:1210 [ref. 33620], Bertaco et al. 2016:417 [ref. 34561], Reis 2017:[4] [ref. 35226], Delapiewe et al. 2023:2 [ref. 40645]). Current status: Valid as Eurycheilichthys Reis & Schaefer 1993. Loricariidae: Hypoptopomatinae.

Eurycheilus Reis [R. E.] & Schaefer [S. A.] 1992:216 Masc. Eurycheilus pantherinus Reis & Schaefer 1992. Type by monotypy. Objectively invalid; preoccupied by Eurycheilus Septfontaine 1970 in fossil cephalopods, replaced by Eurycheilichthys Reis & Schaefer 1993. •In the synonymy of Eurycheilichthys Reis & Schaefer 1993 -- (Isbrücker 2002:15 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Ferraris 2007:236 [ref. 29155], Reis 2017:[4] [ref. 35226]). 1°Homonym. Current status: Synonym of Eurycheilichthys Reis & Schaefer 1993. Loricariidae: Hypoptopomatinae.

Euryochus Pereira [E. H. L.] & Reis [R. E.] 2017:76 Masc. Euryochus thysanos Pereira & Reis 2017. Type by monotypy. •Valid as Euryochus Pereira & Reis 2017. Current status: Valid as Euryochus Pereira & Reis 2017. Loricariidae: Hypoptopomatinae.

Exastilithoxus Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:88, 91 Masc. Pseudacanthicus (Lithoxus) fimbriatus Steindachner 1915. Type by original designation (also monotypic). •Valid as Exastilithoxus Isbrücker & Nijssen 1979 -- (Isbrücker 1980:78 [ref. 2303], Burgess 1989:438 [ref. 12860], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:15 [ref. 27178], Fisch-Muller in Reis et al. 2003:384 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:236 [ref. 29155], Lujan 2008:413 [ref. 29847], Lujan & Birindelli 2011:45 [ref. 31408], Lujan et al. 2018:[15] [ref. 36081]). Current status: Valid as Exastilithoxus Isbrücker & Nijssen 1979. Loricariidae: Hypostominae.

Farlowella Eigenmann [C. H.] & Eigenmann [R. S.] 1889:32 Fem. Acestra acus Kner 1853. Type by being a replacement name. Replacement for Acestra Kner 1853, preoccupied by Acestra Bonaparte 1846 in fishes and in 1852 in Hemiptera [not researched]. •Valid as Farlowella Eigenmann & Eigenmann 1889 -- (Isbrücker 1980:96 [ref. 2303], Burgess 1989:440 [ref. 12860], Retzer & Page 1997:48 [ref. 23176], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:128 [ref. 24147], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:332 [ref. 27061], Retzer 2006:59 [ref. 28957], Covain & Fisch-Muller 2007:28 [ref. 29329], Ferraris 2007:237 [ref. 29155], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Rodriguez et al. 2011:882 [ref. 31506], Ballen & Mojica 2014:135 [ref. 33176], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Ballen et al. 2016:[1] [ref. 34813], Ballen et al. 2016:325 [ref. 34915], Terán et al. 2019:1 [ref. 36818], Londoño-Burbano & Reis 2021:60 [ref. 38183], Dopazo et al. 2023:1 [ref. 40178]). Current status: Valid as Farlowella Eigenmann & Eigenmann 1889. Loricariidae: Loricariinae.

Fonchiiichthys Isbrücker [I. J. H.] & Michels [J. P.] in Isbrücker et al. 2001:18 Masc. Loricaria uracantha Kner 1863. Type by original designation. •Synonym of Rineloricaria Bleeker 1862 -- (Ferraris in Reis et al. 2003:341 [ref. 27061], Covain & Fisch-Muller 2007:36 [ref. 29329], Covain et al. 2015:513 [22] [ref. 34066]). •Valid as Fonchiiichthys Isbrücker & Michels 2001 -- (Isbrücker 2002:16 [ref. 27178], Ferraris 2007:240 [ref. 29155], Rodriguez & Miquelarena 2008:1636 [ref. 29906]). Current status: Synonym of Rineloricaria Bleeker 1862. Loricariidae: Loricariinae.

Fonchiiloricaria Rodriguez [M. S.], Ortega [H.] & Covain [R.] 2011:882 Fem. Fonchiiloricaria nanodon Rodriguez, Ortega & Covain 2011. Type by original designation (also monotypic). •Valid as Fonchiiloricaria Rodriguez, Ortega & Covain 2011 -- (Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Fonchiiloricaria Rodriguez, Ortega & Covain 2011. Loricariidae: Loricariinae.

Furcodontichthys Rapp Py-Daniel [L. H.] 1981:2 Masc. Furcodontichthys novaesi Rapp Py-Daniel 1981. Type by original designation (also monotypic). •Valid as Furcodontichthys Rapp Py-Daniel 1981 -- (Burgess 1989:441 [ref. 12860], Isbrücker 2002:16 [ref. 27178], Ferraris in Reis et al. 2003:334 [ref. 27061], Covain & Fisch-Muller 2007:29 [ref. 29329], Ferraris 2007:240 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Furcodontichthys Rapp Py-Daniel 1981. Loricariidae: Loricariinae.

Fusiloricaria (subgenus of Loricaria) Fowler [H. W.] 1940:247 Fem. Loricaria (Fusiloricaria) clavipinna Fowler 1940. Type by original designation (also monotypic). •Synonym of Loricaria Linnaeus 1758 -- (Isbrücker 1980:115 [ref. 2303], Isbrücker 1981:57 [ref. 5522], Isbrücker 2002:16 [ref. 27178], Ferraris in Reis et al. 2003:337 [ref. 27061], Ferraris 2007:268 [ref. 29155]). Current status: Synonym of Loricaria Linnaeus 1758. Loricariidae: Loricariinae.

Glyptoperichthys Weber [C.] 1991:639 Masc. Ancistrus lituratus Kner 1854. Type by original designation. •Valid as Glyptoperichthys Weber 1991 -- (Weber 1992:14 [ref. 19714], Page et al. 1996:186 [ref. 22598], Burgess & Finley 1996:169 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:16 [ref. 27178], Weber in Reis et al. 2003:352 [ref. 27061]). •Synonym of Pterygoplichthys Gill 1858 -- (Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:290 [ref. 29155]). Current status: Synonym of Pterygoplichthys Gill 1858. Loricariidae: Hypostominae.

Guyanancistrus Isbrücker [I. J. H.] In Isbrücker et al. 2001:19 Masc. Lasiancistrus brevispinis Heitmans, Nijssen & Isbrücker 1983. Type by original designation. •Synonym of Pseudancistrus Bleeker 1862 -- (Armbruster 2004:53, 59 [ref. 27644], Armbruster 2004:5 [ref. 27844], Ferraris 2007:287 [ref. 29155]). •Valid as Guyanancistrus Isbrücker 2001 -- (Isbrücker 2002:16 [ref. 27178], Fisch-Muller in Reis et al. 2003:384 [ref. 27061], Covain & Fisch-Muller 2012:235 [ref. 31998], Silva et al. 2014:11 [ref. 33302], Fisch-Muller et al. 2018:23 [ref. 35723]). Current status: Valid as Guyanancistrus Isbrücker 2001. Loricariidae: Hypostominae.

Gymnotocinclus Carvalho [T. P.], Lehmann A. [P.] & Reis [R. E.] 2008:330 Masc. Gymnotocinclus anosteos Carvalho, Lehmann A. & Reis 2008. Type by original designation (also monotypic). •Valid as Gymnotocinclus Carvalho, Lehmann A. & Reis 2008 -- (Reis et al. 2012:10 [ref. 31863], Roxo et al. 2017:337 [ref. 35310]). •Synonym of Corumbataia Britski 1997 -- (Roxo et al. 2019:160 [ref. 36538]). Current status: Synonym of Corumbataia Britski 1997. Loricariidae: Hypoptopomatinae.

Harttia Steindachner [F.] 1877:668 [110] Fem. Harttia loricariformis Steindachner 1877. Type by monotypy. Apparently appeared first as name only 1876:191 [ref. 12584]; dates to p. 668 as above; on p. 110 of separate. •Valid as Harttia Steindachner 1877 -- (Isbrücker 1980:89 [ref. 2303], Burgess 1989:439 [ref. 12860], Oyakawa 1993 [ref. 21109], Montoya-Burgos et al. 1998:367 [ref. 23850], Langeani et al. 2001:140 [ref. 25126], Rapp Py-Daniel & Oliveira 2001:81 [ref. 25404], Isbrücker 2002:16 [ref. 27178], Ferraris in Reis et al. 2003:334 [ref. 27061], Provenzano et al. 2005:519 [ref. 28461], Covain et al. 2006:1 [ref. 28739], Covain & Fisch-Muller 2007:29 [ref. 29329], Ferraris 2007:240 [ref. 29155], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Covain et al. 2012:148 [ref. 32000], Oyakawa et al. 2013:779 [ref. 33027], Covain et al. 2015:513 [22] [ref. 34066] in Harttiini, Oyakawa et al. 2018:75 [ref. 35818], Oliveira & Oyakawa 2019:401 [ref. 36657], Londoño-Burbano & Reis 2021:59 [ref. 38183], Caldas et al. 2022:1 [ref. 39804]). Current status: Valid as Harttia Steindachner 1877. Loricariidae: Loricariinae.

Harttiella Boeseman [M.] 1971:25 Fem. Harttia crassicauda Boeseman 1953. Type by original designation. Misspelled Hartiella in Zoological Record for 1971, corrected in 1972. •Valid as Harttiella Boeseman 1971 -- (Isbrücker 1980:89 [ref. 2303], Burgess 1989:439 [ref. 12860], Isbrücker 2002:16 [ref. 27178], Ferraris in Reis et al. 2003:336 [ref. 27061], Covain & Fisch-Muller 2007:30 [ref. 29329], Ferraris 2007:242 [ref. 29155], Covain et al. 2012:136 [ref. 32000], Covain et al. 2015:513 [22] [ref. 34066] in Harttiini, Londoño-Burbano & Reis 2021:59 [ref. 38183]). Current status: Valid as Harttiella Boeseman 1971. Loricariidae: Loricariinae.

Hemiancistrus Bleeker [P.] 1862:2 Masc. Ancistrus medians Kner 1854. Type by original designation (also monotypic). •Valid as Hemiancistrus Bleeker 1862 -- (Isbrücker 1980:49 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:434 [ref. 12860], Malabarba 1989:148 [ref. 14217], Montoya-Burgos et al. 1998:367 [ref. 23850], Cardoso & Malabarba 1999:141 [ref. 24148], Isbrücker 2002:16 [ref. 27178], Cardoso & Lucinda 2003:81 [ref. 26858], Fisch-Muller in Reis et al. 2003:384 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Cardoso & da Silva 2004:1 [ref. 27704], Cardoso 2004:173 [ref. 27799], Werneke et al. 2005:533 [ref. 28457], Werneke et al. 2005:543 [ref. 28456], Ferraris 2007:242 [ref. 29155], Armbruster 2008:49 [ref. 29740], de Souza et al. 2008:419 [ref. 29848], Lujan & Chamon 2008:272 [ref. 29977], Lujan & Chamon 2008:272 [ref. 29977], Lujan et al. 2014:16 [ref. 32454] as Hemiancistrus clade, Ambruster et al. 2015:97 [ref. 33670], Bertaco et al. 2016:418 [ref. 34561], Provenzano & Barriga 2017:221 [ref. 35332]). Current status: Valid as Hemiancistrus Bleeker 1862. Loricariidae: Hypostominae.

Hemiloricaria Bleeker [P.] 1862:3 Fem. Hemiloricaria caracasensis Bleeker 1862. Type by original designation (also monotypic). Species as name only in 1862:3, apparently dates to 1863:81. In competition with Rineloricaria Bleeker 1862; first reviser not researched. •Doubtfully a synonym of Rineloricaria Bleeker 1862 -- (Isbrücker 1980:103 [ref. 2303]). •Valid as Hemiloricaria Bleeker 1862 -- (Isbrücker et al. 2001:23 [ref. 25649], Isbrücker 2002:17 [ref. 27178], Ferraris 2007:244 [ref. 29155]). •Synonym of Rineloricaria Bleeker 1862 -- (Ferraris in Reis et al. 2003:341 [ref. 27061], Covain & Fisch-Muller 2007:36 [ref. 29329], Covain et al. 2015:513 [22] [ref. 34066]). Current status: Synonym of Rineloricaria Bleeker 1862. Loricariidae: Loricariinae.

Hemiodon Kner [R.] 1853:24 Masc. Hemiodon depressus Kner 1853. Type by subsequent designation. Type designated by Bleeker 1862:4 [ref. 393] and 1863:82 [ref. 401]. Objectively invalid; preoccupied by Hemiodon Swainson 1840 in Mollusca; replaced by Reganella Eigenmann 1905. •Synonym of Reganella Eigenmann 1905 -- (Isbrücker 1980:123 [ref. 2303], Isbrücker 2002:17 [ref. 27178], Ferraris in Reis et al. 2003:341 [ref. 27061], Ferraris 2007:293 [ref. 29155]). 1°Homonym. Current status: Synonym of Reganella Eigenmann 1905. Loricariidae: Loricariinae.

Hemiodontichthys Bleeker [P.] 1862:4 Masc. Hemiodon acipenserinus Kner 1853. Type by original designation (also monotypic). Homiodontichthys is a misspelling. •Valid as Hemiodontichthys Bleeker 1862 -- (Isbrücker & Nijssen 1974:201 [ref. 7126], Isbrücker 1980:130 [ref. 2303], Burgess 1989:445 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:129 [ref. 24147], Isbrücker 2002:17 [ref. 27178], Ferraris in Reis et al. 2003:336 [ref. 27061], Covain & Fisch-Muller 2007:30 [ref. 29329], Ferraris 2007:247 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Hemiodontichthys Bleeker 1862. Loricariidae: Loricariinae.

Hemipsilichthys Eigenmann [C. H.] & Eigenmann [R. S.] 1889:46 Masc. Xenomystus gobio Lütken 1874. Type by being a replacement name. Replacement for Xenomystus Lütken 1874, preoccupied by Xenomystus Günther 1868 in fishes. •Valid as Hemipsilichthys Eigenmann & Eigenmann 1889 -- (Isbrücker 1980:11 [ref. 2303], Burgess 1989:429 [ref. 12860], Malabarba 1989:151 [ref. 14217], Pereira & Reis 1992 [ref. 17635], Montoya-Burgos et al. 1998:367 [ref. 23850], Reis & Pereira 1999:45 [ref. 23669], Oliveira & Oyakawa 1999:73 [ref. 23672], Pereira et al. 2000:377 [ref. 25081], Bizerril 1995:115 [ref. 25087], Pereira & Reis 2002:98 [ref. 26071], Pereira et al. 2003:2 [ref. 27068], Weber in Reis et al. 2003:353 [ref. 27061], Armbruster 2004:57 [ref. 27644], Reis et al. 2006:280 [ref. 28706], Ferraris 2007:247 [ref. 29155]). Current status: Valid as Hemipsilichthys Eigenmann & Eigenmann 1889. Loricariidae: Delturinae.

Hirtella Pereira [E. H. L.], Zanata [A. M.], Cetra [M.] & Reis [R. E.] 2014:673 Fem. Hirtella carinata Pereira, Zanata, Cetra & Reis 2014. Type by original designation (also monotypic). •Valid as Hirtella Pereira, Zanata, Cetra & Reis 2014 -- (Pereira & Reis 2017:71 [ref. 35307]). Current status: Valid as Hirtella Pereira, Zanata, Cetra & Reis 2014. Loricariidae: Hypoptopomatinae.

Hisonotus Eigenmann [C. H.] & Eigenmann [R. S.] 1889:40 Masc. Hisonotus notatus Eigenmann & Eigenmann 1889. Type by original designation (also monotypic). •Synonym of Otocinclus Cope 1871 -- (Isbrücker 1980:81 [ref. 2303]). •Synonym of Microlepidogaster Eigenmann & Eigenmann 1889 -- (Schaefer 1991:2 [ref. 18926], Schaefer 1997:8 [ref. 23213]). •Valid as Hisonotus Eigenmann & Eigenmann 1889 -- (Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], Montoya-Burgos et al. 1998:367 [ref. 23850], Aquino et al. 2001:2 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Britski & Garavello 2003:588 [ref. 27131], Schaefer in Reis et al. 2003:322 [ref. 27061], Almirón & Azpelicueta 2006:87 [ref. 28674], Azpelicueta & Almirón 2007:591 [ref. 29353], Britski & Garavello 2007:413 [ref. 29429], Cramer et al. 2007:56 [ref. 29959] and polyphyletic, Ferraris 2007:248 [ref. 29155], Carvalho et al. 2008:510 [ref. 29799], Carvalho & Reis 2009:1 [ref. 30193], Garvalho & Reis 2011:1 [ref. 31240], Carvalho & Datovo 2012:266 [ref. 32054], Martins & Langeani 2012:29 [ref. 32060], Roxo et al. 2013:319 [ref. 32527], Roxo et al. 2014:57 [ref. 33252], Lippert et al. 2014:242 [ref. 33355], Silva et al. 2014:107 [ref. 33533], Roxo et al. 2015:127 [ref. 33763], Roxo et al. 2015:104 [ref. 34024], Zawadzki et al. 2016:373 [ref. 34367], Roxo et al. 2016:227 [ref. 34426], Martins & Langeani 2016:1 [ref. 34533], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:231 [ref. 35203], Roxo et al. 2018:[1] [ref. 35900], Dias et al. 2018:577 [ref. 36235], Roxo et al. 2019:161 [ref. 36538], Ribeiro-Silva et al. 2020:553 [ref. 37845]). Current status: Valid as Hisonotus Eigenmann & Eigenmann 1889. Loricariidae: Hypoptopomatinae.

Hopliancistrus Isbrücker [I. J. H.] & Nijssen [H.] 1989:543 Masc. Hopliancistrus tricornis Isbrücker & Nijssen 1989. Type by original designation (also monotypic). •Valid as Hopliancistrus Isbrücker & Nijssen 1989 -- (Burgess & Finley 1996:169 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:18 [ref. 27178], Fisch-Muller in Reis et al. 2003:386 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:249 [ref. 29155], Oliveira et al. 2021:3 [ref. 38080]). Current status: Valid as Hopliancistrus Isbrücker & Nijssen 1989. Loricariidae: Hypostominae.

Hypancistrus Isbrücker [I. J. H.] & Nijssen [H.] 1991:347 Masc. Hypancistrus zebra Isbrücker & Nijssen 1991. Type by original designation (also monotypic). •Valid as Hypancistrus Isbrücker & Nijssen 1991 -- (Burgess & Finley 1996:169 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:18 [ref. 27178], Armbruster 2002:86 [ref. 25891], Fisch-Muller in Reis et al. 2003:387 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Armbruster et al. 2007:62 [ref. 29036], Ferraris 2007:249 [ref. 29155], Tan & Armbruster 2016:123 [ref. 34145]). Current status: Valid as Hypancistrus Isbrücker & Nijssen 1991. Loricariidae: Hypostominae.

Hypocolpterus Fowler [H. W.] 1943:259 Masc. Hypocolpterus analis Fowler 1943. Type by original designation (also monotypic). •Valid as Hypocolpterus Fowler 1943 -- (Isbrücker 1980:59 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:435 [ref. 12860]). •Synonym of Chaetostoma Tschudi 1846 -- (Burgess & Finley 1996:170 [ref. 22901], Isbrücker 2002:18 [ref. 27178], Fisch-Muller in Reis et al. 2003:379 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:227 [ref. 29155]). Current status: Synonym of Chaetostoma Tschudi 1846. Loricariidae: Hypostominae.

Hypoptopoma Günther [A.] 1868:477 Neut. Hypoptopoma thoracatum Günther 1868. Type by monotypy. Also in Günther 1868:234 [ref. 5756]. Hypoptoma is a misspelling. •Valid as Hypoptopoma Günther 1868 -- (Isbrücker 1980:86 [ref. 2303], Burgess 1989:439 [ref. 12860], Schaefer 1996:925 [ref. 22565], Schaefer 1997:41 [ref. 23213], Schaefer 1991:2 [ref. 18926], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:133 [ref. 24147], Aquino & Miquelarena 2001:1 [ref. 26083], Isbrücker 2002:18 [ref. 27178], Aquino & Schaefer 2002:374 [ref. 26022], Britto & Moreira 2002:1067 [ref. 26512], Schaefer in Reis et al. 2003:323 [ref. 27061], Ferraris 2007:249 [ref. 29155], Aquino & Schaefer 2010:7 [ref. 30875], Delapieve et al. 2018:22 [ref. 35713]). Current status: Valid as Hypoptopoma Günther 1868. Loricariidae: Hypoptopomatinae.

Hypostomatinum Günther [A.] 1868:234 Hypoptopoma thoracatum Günther 1868. Type by monotypy. In the 1990 edition Eschmeyer & Bailey stated: "As Hypoptopoma in Günther (June) 1868 [ref. 1992]." Appeared above (Sept.) as "Hypoptopoma (g. n. Hypostomatinum); reason for name change not stated; can be considered as name published in synonymy and perhaps never made available. Objective synonym of Hypoptopoma Günther 1868." But this name should be deleted as "Hypostomatinum" was the larger group name into which Hypoptopoma new genus was placed and not a new genus. Should be disregarded; not made available from use by Eschmeyer & Bailey (where it was also misspelled) or in list by Isbrücker 1992 [ref. 20893]. Loricariidae: Hypoptopomatinae.

Hypostomus Lacepède [B. G. E.] 1803:144 Masc. Hypostomus guacari Lacepède 1803 (= Acipenser plecostomus Linnaeus 1758). Type by monotypy. Hypostomus guacari Lacepède is an unneeded substitute for A. plecostomus. Spelled Hypostoma early authors. •Valid as Hypostomus Lacepède 1803 -- (Isbrücker 1980:17 [ref. 2303], Weber 1987 [ref. 6241], Burgess 1989:430 [ref. 12860], Reis et al. 1990 [ref. 16139], López & Miquelarena 1991:13 [ref. 23548], Mazzoni et al. 1994 [ref. 21507], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:135 [ref. 24147], Weber & Montoya-Burgos 2002:365 [ref. 26428], Isbrücker 2002:18 [ref. 27178], Ferraris 2003:865 [ref. 26999], Weber in Reis et al. 2003:355 [ref. 27061], Armbruster 2003:3 [ref. 27426], Armbruster 2004:53 [ref. 27644], Armbruster & de Souza 2005:2 [ref. 28321], Scharpf 2006:20 [ref. 30386], Armbruster et al. 2007:59 [ref. 29252], Birindelli et al. 2007:271 [ref. 29280], Ferraris 2007:250 [ref. 29155], Jerep et al. 2007:435 [ref. 29465], Zawadzki et al. 2008:396 [ref. 29845], Zawadzki et al. 2008:403 [ref. 29846], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Minckley & Marsh 2009:228 [ref. 31114], Carvalho et al. 2010:39 [ref. 30754], Zawadzki et al. 2010:719 [ref. 31074], Weber et al. 2012:195 [ref. 31999], Zawadzki et al. 2012:245 [ref. 32031], Cardoso et al. 2012:69 [ref. 32154], Martins et al. 2012:494 [ref. 32197], Zawadzki et al. 2013:73 [ref. 31701], Kottelat 2013:215 [ref. 32989], Zawadzki & Carvalho 2014:43 [ref. 33257], Zawadzki et al. 2014:97 [ref. 33233], Tencatt et al. 2014:585 [ref. 33520], Martins et al. 2014:1 [ref. 33617], Zawadzki et al. 2015:49 [ref. 33866], Cardoso et al. 2016:9 [ref. 34373], Zhang et al. 2016:211 [ref. 34477], Zanata & Pitanga 2016:23 [ref. 34535], Bertaco et al. 2016:418 [ref. 34561], Zawadzki et al. 2016:263 [ref. 34908], Zawadzki et al. 2017:1 [ref. 35355], Ramos et al. 2017:1 [ref. 35396], Zawadzki et al. 2017:560 [ref. 35666], Zawadzki et al. 2018:1 [ref. 35944], Zawadzki et al. 2019:1 [ref. 36576], Cardoso et al. 2019:1 [ref. 36685], Zawadzki et al. 2019:1 [ref. 37170], Zawadzki et al. 2020:1 [ref. 37631], Oliveira et al. 2020:1 [ref. 37668], Anjos et al. 2021:[1] [ref. 38882], Penido et al. 2021:1 [ref. 38145], Zawadzki et al. 2021:98 [ref. 38157], Soares et al. 2021:1 [ref. 38335], Zawadzki & Penido 2021:1 [ref. 38404], Dias & Zawadzki 2021:1 [ref. 38417], Lustosa-Costa et al. 2022:1 [ref. 39190], Zawadzki & da Silva 2022:1 [ref. 39204], Oliveira et al. 2022:339 [ref. 39824], Penido et al. 2023:103 [ref. 40572], Zawadzki et al. 2024:1 [ref. 40820]). Current status: Valid as Hypostomus Lacepède 1803. Loricariidae: Hypostominae.

Isbrueckerichthys Derijst [E.] 1996:64 Masc. Hemipsilichthys duseni Miranda Ribeiro 1907. Type by original designation. •Valid as Isbrueckerichthys Derijst 1996 -- (Burgess & Finley 1996:169 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Pereira & Reis 2002:141 [ref. 26071], Isbrücker 2002:20 [ref. 27178], Weber in Reis et al. 2003:364 [ref. 27061], Pereira & Oyakawa 2003:3 [ref. 27318], Ambruster 2004:57 [ref. 27644], Jerep et al. 2006:54 [ref. 28877], Ferraris 2007:262 [ref. 29155], Pereira et al. 2010:37 [ref. 30753], Roxo et al. 2012:1 [ref. 31839], Roxo et al. 2012:37 [ref. 32073], Pereira & Reis 2017:72 [ref. 35307]). Current status: Valid as Isbrueckerichthys Derijst 1996. Loricariidae: Hypoptopomatinae.

Isorineloricaria Isbrücker [I. J. H.] 1980:15, 181 Fem. Plecostomus spinosissimus Steindachner 1880. Type by original designation (also monotypic). •Synonym of Hypostomus Lacepède 1803 -- (Armbruster 2004:53, 60 [ref. 27644]). •Valid as Isorineloricaria Isbrücker 1980 -- (Burgess 1989:430 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:20 [ref. 27178], Weber in Reis et al. 2003:364 [ref. 27061], Ferraris 2007:263 [ref. 29155], Ray & Armbruster 2016:526 [ref. 34178]). Current status: Valid as Isorineloricaria Isbrücker 1980. Loricariidae: Hypostominae.

Ixinandria Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:87, 91 Fem. Loricaria steinbachi Regan 1906. Type by original designation. •Valid as Ixinandria Isbrücker & Nijssen 1979 -- (Isbrücker 1980:103 [ref. 2303], Burgess 1989:441 [ref. 12860], Isbrücker 2002:20 [ref. 27178], Ferraris in Reis et al. 2003:336 [ref. 27061], Covain & Fisch-Muller 2007:30 [ref. 29329], Ferraris 2007:263 [ref. 29155], Rodriguez et al. 2008:369 [ref. 29843]). •Synonym of Rineloricaria Bleeker 1862 -- (Covain et al. 2015:513 [22] [ref. 34066]). Current status: Synonym of Rineloricaria Bleeker 1862. Loricariidae: Loricariinae.

Kronichthys Miranda Ribeiro [A. de] 1908:[1] Masc. Kronichthys subteres Miranda Ribeiro 1908. Type by monotypy. Ref. 3715 is unpaginated. •Valid as Kronichthys Miranda Ribeiro 1908 -- (Isbrücker 1980:13 [ref. 2303], Burgess 1989:430 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:20 [ref. 27178], Weber in Reis et al. 2003:365 [ref. 27061], Armbruster 2004:57 [ref. 27644], Ferraris 2007:263 [ref. 29155], Reis et al. 2012:6 [ref. 31863], Roxo et al. 2012:37 [ref. 32073], Pereira & Reis 2017:73 [ref. 35307], Souza et al. 2020:[3] [ref. 38094]). Current status: Valid as Kronichthys Miranda Ribeiro 1908. Loricariidae: Hypoptopomatinae.

Lamontichthys Miranda Ribeiro [P. de] 1939:12 Masc. Harttia filamentosa LaMonte 1935. Type by original designation (also monotypic). •Valid as Lamontichthys Miranda Ribeiro 1939 -- (Isbrücker & Nijssen 1978 [ref. 2305], Isbrücker 1980:91 [ref. 2303], Burgess 1989:440 [ref. 12860], Isbrücker 2002:20 [ref. 27178], Ferraris in Reis et al. 2003:336 [ref. 27061], Covain & Fisch-Muller 2007:31 [ref. 29329], Ferraris 2007:263 [ref. 29155], Paixão & Toledo-Piza 2009:522 [ref. 30675], Rodriguez et al. 2011:882 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Londoño-Burbano & Reis 2021:61 [ref. 38183]). Current status: Valid as Lamontichthys Miranda Ribeiro 1939. Loricariidae: Loricariinae.

Lampiella Isbrücker [I. J. H.] in Isbrücker et al. 2001:19 Fem. Otocinclus gibbosus Miranda Ribeiro 1908. Type by original designation (also monotypic). •Synonym of Otocinclus Cope 1871 -- (Schaefer in Reis et al. 2003:324 [ref. 27061]). •Valid as Lampiella Isbrücker 2001 -- (Isbrücker 2002:20 [ref. 27178], Ferraris 2007:264 [ref. 29155]). Current status: Valid as Lampiella Isbrücker 2001. Loricariidae: Hypoptopomatinae.

Lasiancistrus (subgenus of Ancistrus) Regan [C. T.] 1904:224 Masc. Chaetostomus heteracanthus Günther 1869. Type by subsequent designation. Type designated by Eigenmann 1910:409 [ref. 1224]. Correct spelling for genus of type species is Chaetostoma. •Valid as Lasiancistrus Regan 1904 -- (Isbrücker 1980:43 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Nijssen & Isbrücker 1985 [ref. 9706], Burgess 1989:433 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster & Provenzano 2000:241 [ref. 25069], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:387 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Armbruster 2005:550 [ref. 28554], Ferraris 2007:264 [ref. 29155], Lujan & Birindelli 2011:39 [ref. 31408], Lujan & Birindelli 2011:44 [ref. 31408], Poveda-Cuellar et al. 2023:1 [ref. 40298]). Current status: Valid as Lasiancistrus Regan 1904. Loricariidae: Hypostominae.

Leliella Isbrücker [I. J. H.] in Isbrücker, Seidel, Michels, Schraml & Werner 2001:20 Fem. Rineloricaria heteroptera Isbrücker & Nijssen 1976. Type by original designation (also monotypic). •Valid as Leliella Isbrücker 2001 -- (Isbrücker 2002:20 [ref. 27178]). •Synonym of Rineloricaria Bleeker 1862 -- (Ferraris in Reis et al. 2003:341 [ref. 27061], Covain & Fisch-Muller 2007:36 [ref. 29329], Ferraris 2007:293 [ref. 29155], Rodriguez & Miquelarena 2008:1636 [ref. 29906], Covain et al. 2015:513 [22] [ref. 34066]). Current status: Synonym of Rineloricaria Bleeker 1862. Loricariidae: Loricariinae.

Leporacanthicus Isbrücker [I. J. H.] & Nijssen [H.] 1989:544 Masc. Leporacanthicus galaxias Isbrücker & Nijssen 1989. Type by original designation. •Valid as Leporacanthicus Isbrücker & Nijssen 1989 -- (Isbrücker et al. 1992 [ref. 20677], Burgess & Finley 1996:169 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:388 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:265 [ref. 29155]). Current status: Valid as Leporacanthicus Isbrücker & Nijssen 1989. Loricariidae: Hypostominae.

Leptoancistrus Meek [S. E.] & Hildebrand [S. F.] 1916:254 Masc. Acanthicus canensis Meek & Hildebrand 1913. Type by original designation (also monotypic). •Valid as Leptoancistrus Meek & Hildebrand 1916 -- (Isbrücker 1980:65 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:436 [ref. 12860], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:388 [ref. 27061], Armbruster 2004:53 [ref. 27644], Ferraris 2007:266 [ref. 29155], Salcedo 2013:468 [ref. 32670], Provenzano 2018:407 [ref. 35789]). Current status: Valid as Leptoancistrus Meek & Hildebrand 1916. Loricariidae: Hypostominae.

Leptotocinclus Delapieve [M. L. S.], Lehmann A [P.] & Reis [R. E.] 2018:24 Masc. Leptotocinclus madeirae Delapieve, Lehmann A & Reis 2018. Type by original designation. •Valid as Leptotocinclus Delapieve, Lehmann A & Reis 2018. Current status: Valid as Leptotocinclus Delapieve, Lehmann A & Reis 2018. Loricariidae: Hypoptopomatinae.

Limatulichthys Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:88, 91 Masc. Loricaria punctata Regan 1904. Type by original designation (also monotypic). •Valid as Limatulichthys Isbrücker & Nijssen 1979 -- (Isbrücker 1980:123 [ref. 2303], Burgess 1989:444 [ref. 12860], Isbrücker 2002:20 [ref. 27178], Ferraris in Reis et al. 2003:336 [ref. 27061], Covain & Fisch-Muller 2007:31 [ref. 29329], Ferraris 2007:266 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Limatulichthys Isbrücker & Nijssen 1979. Loricariidae: Loricariinae.

Lipopterichthys Norman [J. R.] 1935:627 Masc. Lipopterichthys carrioni Norman 1935. Type by original designation (also monotypic). •Valid as Lipopterichthys Norman 1935 -- (Isbrücker 1980:65 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:436 [ref. 12860], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:389 [ref. 27061], Ferraris 2007:266 [ref. 29155], Salcedo 2013:468 [ref. 32670]). •Synonym of Chaetostoma Tschudi 1846 -- (Armbruster 2004:53, 59 [ref. 27644], Lujan et al. 2014:283 [ref. 33495]). Current status: Synonym of Chaetostoma Tschudi 1846. Loricariidae: Hypostominae.

Liposarcus Günther [A.] 1864:238 Masc. Hypostomus multiradiatus Hancock 1828. Type by subsequent designation. Type designated by Jordan 1919:332 [ref. 4904]. •Valid as Liposarcus Günther 1864 -- (Weber 1991:638 [ref. 19114], Weber 1992:8 [ref. 19714], Burgess & Finley 1996:169 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:134 [ref. 24147], Isbrücker 2002:20 [ref. 27178], Weber in Reis et al. 2003:365 [ref. 27061]). •Synonym of Pterygoplichthys Gill 1858 -- (Isbrücker 1980:40 [ref. 2303], Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:290 [ref. 29155], Kottelat 2013:215 [ref. 32989]). Current status: Synonym of Pterygoplichthys Gill 1858. Loricariidae: Hypostominae.

Lithogenes Eigenmann [C. H.] 1909:6 Masc. Lithogenes villosus Eigenmann 1909. Type by monotypy. •Valid as Lithogenes Eigenmann 1909 -- (Isbrücker 1980:6 [ref. 2303]; transferred from Astroblepidae to Loricariidae by Nijssen & Isbrücker 1987 [ref. 5993], Burgess 1989:429 [ref. 12860], de Pinna 1998:303 [ref. 23847], Montoya-Burgos et al. 1998:364 [ref. 23850], Reis & Pereira 1999:45 [ref. 23669], Procenzano et al. 2003:562 [ref. 27128], Reis et al. 2003:318 [ref. 27061], Ferraris 2007:267 [ref. 29155], Schaefer & Provenzano 2008:2 [ref. 30039] in Lithogeninae). Current status: Valid as Lithogenes Eigenmann 1909. Loricariidae: Lithogeninae.

Lithoxancistrus Isbrücker [I. J. H.], Nijssen [H.] & Cala [P.] 1988:14 Masc. Lithoxancistrus orinoco Isbrücker, Nijssen & Cala 1988. Type by original designation (also monotypic). •Covain & Fisch-Muller 2012:229 [ref. 31998] define a monotypic Lithoxancistrus Isbrücker, Nijssan & Cala 1988. •Synonym of Pseudancistrus Bleeker 1862 -- (Armbruster 2004:53, 59 [ref. 27644], Armbruster 2004:5 [ref. 27844], Ferraris 2007:286 [ref. 29155], Silva et al. 2014:11 [ref. 33302]). •Valid as Lithoxancistrus Isbrücker, Nijssen & Cala 1988 -- (Burgess 1989:436 [ref. 12860], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:389 [ref. 27061], DoNascimiento et al. 2017:83 [ref. 35633]). Current status: Valid as Lithoxancistrus Isbrücker, Nijssen & Cala 1988. Loricariidae: Hypostominae.

Lithoxus Eigenmann [C. H.] 1910:405, 412 Masc. Lithoxus lithoides Eigenmann 1912. Type by subsequent monotypy. Appeared in key in footnote (p. 405); we agree with Boeseman (1982:43 [ref. 492]) that this constitutes original description; described fully in Eigenmann 1912:242 [ref. 1227]. Type as name only in 1910; type by subsequent monotypy. •Valid as Lithoxus Eigenmann 1910 -- (Isbrücker 1980:77 [ref. 2303], Boeseman 1982 [ref. 492], Burgess 1989:438 [ref. 12860], Nijssen & Isbrücker 1990:327 [ref. 16655], Muller & Isbrücker 1993 [ref. 20657], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:21 [ref. 27178], Fisch-Muller in Reis et al. 2003:389 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644] dated 1909, Ferraris 2007:267 [ref. 29155], Lujan 2008:413 [ref. 29847], Lujan & Birindelli 2011:45 [ref. 31408], Lujan et al. 2014:15 [ref. 33495] as Lithoxus clade, Silva et al. 2017:151 [ref. 35668], Lujan et al. 2018:[15] [ref. 36081]). Current status: Valid as Lithoxus Eigenmann 1910. Loricariidae: Hypostominae.

Loraxichthys Salcedo [N. J.] 2013:559 Masc. Loraxichthys lexa Salcedo 2013. Type by original designation (also monotypic). •Synonym of Chaetostoma Tschudi 1846 -- (Lujan et al. 2014:283 [ref. 33495]). Current status: Synonym of Chaetostoma Tschudi 1846. Loricariidae: Hypostominae.

Loricaria Linnaeus [C.] 1758:307 Fem. Loricaria cataphracta Linnaeus 1758. Type by monotypy. •Valid as Loricaria Linnaeus 1758 -- (Isbrücker 1981 [ref. 5522], Burgess 1989:443 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:132 [ref. 24147], Isbrücker 2002:21 [ref. 27178], Ferraris 2003:865 [ref. 26999], Ferraris in Reis et al. 2003:337 [ref. 27061], Rodriguez & Miquelarena 2005:139 [ref. 28787], Covain & Fisch-Muller 2007:32 [ref. 29329], Ferraris 2007:268 [ref. 29155], Thomas & Rapp Py-Daniel 2008:379 [ref. 29844], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Thomas & Sabaj Pérez 2010:274 [ref. 30831], Rodriguez et al. 2011:882 [ref. 31506], Rodriguez et al. 2012:49 [ref. 31866], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Bertaco et al. 2016:419 [ref. 34561], Londoño-Burbano et al. 2020:1 [ref. 37854], Saraiva et al. 2021:424 [ref. 38090], Londoño-Burbano et al. 2023:1 [ref. 40487]). Current status: Valid as Loricaria Linnaeus 1758. Loricariidae: Loricariinae.

Loricariichthys Bleeker [P.] 1862:3 Masc. Loricaria maculata Bloch 1794. Type by original designation (also monotypic). •Valid as Loricariichthys Bleeker 1862 -- (Isbrücker 1980:125 [ref. 2303] and see Isbrücker remarks on Plecostomus, Burgess 1989:444 [ref. 12860], Malabarba 1989:154 [ref. 14217], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:131 [ref. 24147], Reis & Pereira 2000:1029 [ref. 25021], Isbrücker 2002:23 [ref. 27178], Ferraris in Reis et al. 2003:338 [ref. 27061], Covain & Fisch-Muller 2007:31 [ref. 29329], Ferraris 2007:269 [ref. 29155], Rodriguez et al. 2011:882 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Bertaco et al. 2016:419 [ref. 34561], Reis et al. 2021:557 [ref. 38433]). Current status: Valid as Loricariichthys Bleeker 1862. Loricariidae: Loricariinae.

Macrotocinclus Isbrücker [I. J. H.] & Seidel [I.] in Isbrücker et al. 2001:20 Masc. Otocinclus affinis Steindachner 1877. Type by original designation. •Valid as Macrotocinclus Isbrücker & Seidel 2001 -- (Isbrücker 2002:23 [ref. 27178], Ferraris 2007:271 [ref. 29155]). •Synonym of Otocinclus Cope 1871 -- (Schaefer in Reis et al. 2003:324 [ref. 27061], Delapieve et al. 2018:23 [ref. 35713]). Current status: Synonym of Otocinclus Cope 1871. Loricariidae: Hypoptopomatinae.

Megalancistrus Isbrücker [I. J. H.] 1980:52 Masc. Chaetostomus gigas Boulenger 1895. Type by original designation. •Valid as Megalancistrus Isbrücker 1980 -- (Heitmans et al. 1983 [ref. 5278], Burgess 1989:434 [ref. 12860], Britski et al. 1999:134 [ref. 24147], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:23 [ref. 27178], Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:272 [ref. 29155], Bertaco et al. 2016:419 [ref. 34561]). Current status: Valid as Megalancistrus Isbrücker 1980. Loricariidae: Hypostominae.

Metaloricaria Isbrücker [I. J. H.] 1975:2 Fem. Metaloricaria paucidens Isbrücker 1975. Type by original designation (also monotypic). •Valid as Metaloricaria Isbrücker 1975 -- (Isbrücker 1980:96 [ref. 2303], Isbrücker & Nijssen 1982 [ref. 5277], Burgess 1989:440 [ref. 12860], Isbrücker 2002:23 [ref. 27178], Ferraris in Reis et al. 2003:339 [ref. 27061], Covain & Fisch-Muller 2007:33 [ref. 29329], Ferraris 2007:272 [ref. 29155], Rodriguez et al. 2011:886 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Metaloricaria Isbrücker 1975. Loricariidae: Loricariinae.

Micracanthicus Lujan [N. K.] & Armbruster [J. W.] 2011:216 Masc. Micracanthicus vandragti Lujan & Armbruster 2011. Type by original designation (also monotypic). •Synonym of Hypancistrus Isbrücker & Nijssen 1991 -- (Lujan et al. 2017:x [ref. 35031]). Current status: Synonym of Hypancistrus Isbrücker & Nijssen 1991. Loricariidae: Hypostominae.

Microlepidogaster Eigenmann [C. H.] & Eigenmann [R. S.] 1889:8 Fem. Microlepidogaster perforatus [a] Eigenmann & Eigenmann 1889. Type by original designation (also monotypic). Also appeared in Eigenmann & Eigenmann 1889:42 (18 Aug.) [ref. 1253], original in Apr. 1889. Species originally given as perforatus, emended to perforata. •Synonym of Otocinclus Cope 1871 -- (Isbrücker 1980:81 [ref. 2303]). •Valid as Microlepidogaster Eigenmann & Eienmann 1889 -- (Burgess 1989:439 [ref. 12860], Malabarba 1989:149 [ref. 14217], Schaefer 1991:2 [ref. 18926], Schaefer 1997:42 [ref. 23213], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Isbrücker 2002:23 [ref. 27178], Schaefer in Reis et al. 2003:324 [ref. 27061], Ferraris 2007:272 [ref. 29155], Calegari & Reis 2010:625 [ref. 30974], Martins & Langeani 2011:66 [ref. 31235], Garvalho & Reis 2011:1 [ref. 31240], Martins et al. 2013:379 [ref. 32415], Martins et al. 2014:560 [ref. 33544], Calegari et al. 2014:213 [ref. 33627], Martins et al. 2017:233 [ref. 35356], Martins 2022:269 [ref. 39327]). Current status: Valid as Microlepidogaster Eigenmann & Eigenmann 1889. Loricariidae: Hypoptopomatinae.

Microplecostomus Silva [G. S. C.], Roxo [F. F.], Ochoa [L. E.] & Oliveira [C.] 2016:133 Masc. Microplecostomus forestii Silva, Roxo, Ochoa & Oliveira 2016. Type by original designation (also monotypic). Not assigned to subfamily. •Valid as Microplecostomus Silva, Roxo, Ochoa & Oliveira 2016 -- (Pereira & Reis 2017:82 [ref. 35307]). Current status: Valid as Microplecostomus Silva, Roxo, Ochoa & Oliveira 2016. Loricariidae.

Monistiancistrus Fowler [H. W.] 1940:236 Masc. Monistiancistrus carachama Fowler 1940. Type by original designation (also monotypic). •Valid as Monistiancistrus Fowler 1940 -- (Isbrücker 1980:57 [ref. 2303], Burgess 1989:429 [ref. 12860]). •Synonym of Pseudorinelepis Bleeker 1862 -- (Nijssen & Isbrücker 1987 [ref. 5993], Armbruster & Hardman 1999:56 [ref. 23670], Isbrücker 2002:23 [ref. 27178], Weber in Reis et al. 2003:366 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644] dated 1939, Ferraris 2007:289 [ref. 29155]). Current status: Synonym of Pseudorinelepis Bleeker 1862. Loricariidae: Rhinelepinae.

Nannoplecostomus Ribeiro [A. C.], Lima [F. C. T.] & Pereira [E. H. L.] 2012:638 Masc. Nannoplecostomus eleonorae Ribeiro, Lima & Pereira 2012. Type by original designation (also monotypic). Not assigned to subfamily. •Valid as Nannoplecostomus Ribeiro, Lima & Pereira 2012 -- (Pereira & Reis 2017:82 [ref. 35307]). Current status: Valid as Nannoplecostomus Ribeiro, Lima & Pereira 2012. Loricariidae.

Nannoptopoma Schaefer [S. A.] 1996:915 Neut. Otocinclus spectabilis Eigenmann 1914. Type by original designation. •Synonym of Hypoptopoma Günther 1868 -- (Aquino & Schaefer 2010:7 [ref. 30875]). •Valid as Nannoptopoma Schaefer 1996 -- (Schaefer 1997:41 [ref. 23213], Schaefer & Provenzano 1998:225 [ref. 23317], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Aquino & Miquelarena 2001:1 [ref. 26083], Isbrücker 2002:23 [ref. 27178], Schaefer in Reis et al. 2003:324 [ref. 27061], Ferraris 2007:272 [ref. 29155], Delapieve et al. 2018:22 [ref. 35713]). Current status: Valid as Nannoptopoma Schaefer 1996. Loricariidae: Hypoptopomatinae.

Nannoxyropsis Delapieve [M. L. S.], Lehmann A [P.] & Reis [R. E.] 2018:30 Masc. Nannoxyropsis acicula Delapieve, Lehmann A & Reis 2018. Type by original designation. •Valid as Nannoxyropsis Delapieve, Lehmann A & Reis 2018. Current status: Valid as Nannoxyropsis Delapieve, Lehmann A & Reis 2018. Loricariidae: Hypoptopomatinae.

Neblinichthys Ferraris [C. J., Jr.], Isbrücker [I. J. H.] & Nijssen [H.] 1986:70 Masc. Neblinichthys pilosus Ferraris, Isbrücker & Nijssen 1986. Type by original designation (also monotypic). •Valid as Neblinichthys Ferraris, Isbrücker & Nijssen 1986 -- (Burgess 1989:436 [ref. 12860], Provenzano et al. 1995 [ref. 21886], de Pinna 1998:305 [ref. 23847], Isbrücker 2002:23 [ref. 27178], Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:273 [ref. 29155], Taphorn et al. 2010:616 [ref. 30973], Lujan & Birindelli 2011:45 [ref. 31408], Armbruster & Taphorn 2013:65 [ref. 32700]). Current status: Valid as Neblinichthys Ferraris, Isbrücker & Nijssen 1986. Loricariidae: Hypostominae.

Neoplecostomus (subgenus of Plecostomus) Eigenmann [C. H.] & Eigenmann [R. S.] 1888:171 Masc. Plecostomus microps Steindachner 1877. Type by original designation. •Valid as Neoplecostomus Eigenmann & Eigenmann 1888 -- (Isbrücker 1980:6 [ref. 2303], Burgess 1989:429 [ref. 12860], Langeani 1990 [ref. 16736], Bizerril 1995:693 [ref. 23196], de Pinna 1998:304 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:23 [ref. 27178], Ferraris in Reis et al. 2003:319 [ref. 27061], Armbruster 2004:58 [ref. 27644], Zawadzki et al. 2004:572 [ref. 27753], Ferraris 2007:273 [ref. 29155], Zawadski et al. 2008:31 [ref. 29594], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Roxo et al. 2012:1 [ref. 31839], Roxo et al. 2012:37 [ref. 32073], Roxo et al. 2014:115 [ref. 33492], Andrade & Langeani 2014:1 [ref. 33618], Cherobim et al. 2016:2 [ref. 35001], Pereira & Reis 2017:73 [ref. 35307], Roxo et al. 2017:226 [ref. 35467], Silva et al. 2019:93 [ref. 36454], Oliveira & Oyakawa 2019:401 [ref. 36657]). Current status: Valid as Neoplecostomus Eigenmann & Eigenmann 1888. Loricariidae: Hypoptopomatinae.

Niobichthys Schaefer [S. A.] & Provenzano [F.] 1998:222 Masc. Niobichthys ferrarisi Schaefer & Provenzano 1998. Type by original designation (also monotypic). •Valid as Niobichthys Schaefer & Provenzano 1998 -- (Schaefer 1998:377 [ref. 23692], Isbrücker 2002:23 [ref. 27178], Schaefer in Reis et al. 2003:324 [ref. 27061], Ferraris 2007:274 [ref. 29155], Delapieve et al. 2018:22 [ref. 35713]). Current status: Valid as Niobichthys Schaefer & Provenzano 1998. Loricariidae: Hypoptopomatinae.

Oligancistrus Rapp Py-Daniel [L. H.] 1989:246 Masc. Chaetostomus punctatissimus Steindachner 1881. Type by original designation (also monotypic, one species mentioned). Genus proposed somewhat conditionally but accepted as available (see also Baryancistrus Rapp Py-Daniel and Appendix A in Eschmeyer 1990 [ref. 20647]). •Valid as Oligancistrus Rapp Py-Daniel 1989 -- (Burgess & Finley 1996:168 [ref. 22901], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:23 [ref. 27178], Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Ferraris 2007:274 [ref. 29155]). •Synonym of Spectracanthicus Nijssen & Isbrücker 1987 -- (Armbruster 2004:53, 59 [ref. 27644], Chamon & Rapp Py-Daniel 2014:2 [ref. 33224]). Current status: Synonym of Spectracanthicus Nijssen & Isbrücker 1987. Loricariidae: Hypostominae.

Otocinclus Cope [E. D.] 1871:112 Masc. Otocinclus vestitus Cope 1872. Type by subsequent monotypy. Appeared first with brief description and without species as above; more complete description and species added in 1872:283 [ref. 921]. •Valid as Otocinclus Cope 1871 -- (Isbrücker 1980:81 [ref. 2303], Burgess 1989:438 [ref. 12860], Malabarba 1989:150 [ref. 14217], Schaefer 1991:2 [ref. 18926], Schaefer 1996:925 [ref. 22565], Schaefer 1997:16 [ref. 23213], Schaefer & Provenzano 1998:225 [ref. 23317], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Britski et al. 1999:133 [ref. 24147], Britto & Moreira 2002:1068 [ref. 26512], Britto et al. 2002:733 [ref. 26546], Isbrücker 2002:23 [ref. 27178], Schaefer in Reis et al. 2003:324 [ref. 27061], Reis 2004:109 [ref. 27934], Lehmann 2006:379 [ref. 28896], Ferraris 2007:274 [ref. 29155], Lehmann A. et al. 2010:57 [ref. 30756], Lehmann A. et al. 2010:635 [ref. 31083], Ribeiro & Lehmann A. 2016:240 [ref. 34636], Bertaco et al. 2016:419 [ref. 34561], Delapieve et al. 2018:23 [ref. 35713]). Current status: Valid as Otocinclus Cope 1871. Loricariidae: Hypoptopomatinae.

Otothyris Myers [G. S.] 1927:127 Fem. Otothyris canaliferus Myers 1927. Type by original designation (also monotypic). •Valid as Otothyris Myers 1927 -- (Isbrücker 1980:85 [ref. 2303], Burgess 1989:439 [ref. 12860], Malabarba 1989:151 [ref. 14217], Schaefer 1991:2 [ref. 18926], Reis & Schaefer 1992:222 [ref. 17477], Schaefer 1997:41 [ref. 23213], Garavello et al. 1998:3 [ref. 23346], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:24 [ref. 27178], Schaefer in Reis et al. 2003:325 [ref. 27061], Ferraris 2007:275 [ref. 29155], Rosa et al. 2014:53 [ref. 33228], Bertaco et al. 2016:419 [ref. 34561]). Current status: Valid as Otothyris Myers 1927. Loricariidae: Hypoptopomatinae.

Otothyropsis Ribeiro [A. C.], Carvalho [M.] & Melo [A. L. A.] 2005:491 Masc. Otothyropsis marapoama Ribeiro, Carvalho & Melo 2005. Type by original designation (also monotypic). •Valid as Otothyropsis Ribeiro, Carvalho & Melo 2005 -- (Ferraris 2007:276 [ref. 29155], Calegari et al. 2011:255 [ref. 31384], Calegari et al. 2013:130 [ref. 32493], Lippert et al. 2014:238 [ref. 33355], Calegari et al. 2017:231 [ref. 35203]). •Synonym of Hisonotus Eigenmann & Eigenmann 1889 -- (Roxo et al. 2019:161 [ref. 36538]). Current status: Valid as Otothyropsis Ribeiro, Carvalho & Melo 2005. Loricariidae: Hypoptopomatinae.

Oxyloricaria Bleeker [P.] 1862:3 Fem. Loricaria barbata Kner 1853. Type by original designation (also monotypic). •Synonym of Sturisoma Swainson 1838 -- (Isbrücker 1980:93 [ref. 2303], Isbrücker 2002:24 [ref. 27178], Ferraris in Reis et al. 2003:345 [ref. 27061], Ferraris 2007:298 [ref. 29155], Londoño-Burbano & Reis 2021:S1 [ref. 38183], Cardoso et al. 2023:521 [ref. 40571], Londoño-Burbano & Britto 2023:3 [ref. 40709]). Current status: Synonym of Sturisoma Swainson 1838. Loricariidae: Loricariinae.

Oxyropsis Eigenmann [C. H.] & Eigenmann [R. S.] 1889:39 Fem. Oxyropsis wrightiana Eigenmann & Eigenmann 1889. Type by original designation (also monotypic). •Synonym of Hypoptopoma Günther 1868 -- (Isbrücker 1980:86 [ref. 2303]). •Valid as Oxyropsis Eigenmann & Eigenmann 1889 -- (Schaefer 1991:2 [ref. 18926], Burgess & Finley 1996:169 [ref. 22901], Schaefer 1997:41 [ref. 23213], Schaefer & Provenzano 1998:225 [ref. 23317], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Aquino & Schaefer 2002:375 [ref. 26022], Isbrücker 2002:24 [ref. 27178], Schaefer in Reis et al. 2003:325 [ref. 27061], Ferraris 2007:276 [ref. 29155], Aquino & Sabaj Pérez 2016:129 [ref. 34526], Delapieve et al. 2018:23 [ref. 35713]). Current status: Valid as Oxyropsis Eigenmann & Eigenmann 1889. Loricariidae: Hypoptopomatinae.

Panafilus (subgenus of Panaqolus) Lujan [N. K.], Cramer [C. A.], Covain [R.], Fisch-Muller [S.] & López-Fernández [H.] 2017 Masc. Panaque albomaculatus Kanazawa 1958. Type by original designation. •Synonym of Panaqolus Isbrücker & Schraml 2001, but a valid subgenus Panafilus as described. •Synonym of Panaqolus Isbrücker & Schraml 2001. Current status: Synonym of Panaqolus Isbrücker & Schraml 2001. Loricariidae: Hypostominae.

Panaqoco (subgenus of Panaqolus) Lujan [N. K.], Cramer [C. A.], Covain [R.], Fisch-Muller [S.] & López-Fernández [H.] 2017:332 Masc. Panaque maccus Schaefer & Stewart 1993. Type by original designation (also monotypic). •Synonym of Panaqolus Isbrücker & Schraml 2001, but a valid subgenus Panaqoco as described. •Synonym of Panaqolus Isbrücker & Schraml 2001. Current status: Synonym of Panaqolus Isbrücker & Schraml 2001. Loricariidae: Hypostominae.

Panaqolus Isbrücker [I. J. H.] & Schraml [E.] in Isbrücker et al. 2001:20 Masc. Panaque gnomus Schaefer & Stewart 1993. Type by original designation. •Synonym of Panaque Eigenmann & Eigenmann 1889 -- (Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644] as Panaquolus). •Valid as Panaqolus Isbrücker & Schraml 2001 -- (Isbrücker 2002:24 [ref. 27178], Ferraris 2007:277 [ref. 29155], Lujan et al. 2013:192 [ref. 32784], Cramer 2014:61 [ref. 33229], Cramer & Rapp Py-Daniel 2015:461 [ref. 33945], Tan et al. 2016:[1] [ref. 34532], Cramer & Sousa 2016:1 [ref. 34885], Lujan et al. 2017:333 [11] [ref. 35031] in subgenus Panaqolus). Current status: Valid as Panaqolus Isbrücker & Schraml 2001. Loricariidae: Hypostominae.

Panaque Eigenmann [C. H.] & Eigenmann [R. S.] 1889:44 Masc. Chaetostomus nigrolineatus Peters 1877. Type by original designation. Treated by authors as masculine. •Valid as Panaque Eigenmann & Eigenmann 1898 -- (Isbrücker 1980:74 [ref. 2303], Burgess 1989:437 [ref. 12860], Schaefer & Stewart 1993:313 [ref. 21282], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster 2002:87 [ref. 25891], Chockley & Armbruster 2002:82 [ref. 26069], Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:277 [ref. 29155], Lujan & Chamon 2008:272 [ref. 29977], Lujan et al. 2010:676 [ref. 31098], Ortega-Lara & Lujan 2020:393 [ref. 37306]). Current status: Valid as Panaque Eigenmann & Eigenmann 1889. Loricariidae: Hypostominae.

Parahemiodon Bleeker [P.] 1862:373 Masc. Parahemiodon typus Bleeker 1862. Type by original designation (also monotypic and by use of typus). For information on type see Boeseman 1976:163 [ref. 6991]. •Synonym of Loricariichthys Bleeker 1862 -- (Isbrücker 1980:125 [ref. 2303], Isbrücker 2002:24 [ref. 27178], Ferraris in Reis et al. 2003:338 [ref. 27061], Ferraris 2007:269 [ref. 29155]). Current status: Synonym of Loricariichthys Bleeker 1862. Loricariidae: Loricariinae.

Paralithoxus (subgenus of Lithoxus) Boeseman [M.] 1982:46 Masc. Ancistrus bovallii Regan 1906. Type by original designation. Misspelled Paralithoides in author's abstract (p. 41). •Synonym of Lithoxus Eigenmann 1910 -- (Nijssen & Isbrücker 1990:327 [ref. 16655], Isbrücker 2002:24 [ref. 27178], Fisch-Muller in Reis et al. 2003:389 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:267 [ref. 29155]). •Valid as Paralithoxus Boeseman 1982 -- (Lujan et al. 2018:[11] [ref. 36081], Rapp-Py-Daniel et al. 2019:1 [ref. 37169]). Current status: Valid as Paralithoxus Boeseman 1982. Loricariidae: Hypostominae.

Paraloricaria Isbrücker [I. J. H.] 1979:87, 90 Fem. Loricaria vetula Valenciennes 1835. Type by original designation. •Valid as Paraloricaria Isbrücker 1979 -- (Isbrücker 1980:114 [ref. 2303], Isbrücker 1981:56 [ref. 5522], Burgess 1989:443 [ref. 12860], Isbrücker 2002:25 [ref. 27178], Ferraris in Reis et al. 2003:339 [ref. 27061], Covain & Fisch-Muller 2007:33 [ref. 29329], Ferraris 2007:278 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Bertaco et al. 2016:419 [ref. 34561]). Current status: Valid as Paraloricaria Isbrücker 1979. Loricariidae: Loricariinae.

Parancistrus Bleeker [P.] 1862:2 Masc. Hypostomus aurantiacus Castelnau 1855. Type by original designation (also monotypic). •Valid as Parancistrus Bleeker 1862 -- (Isbrücker 1980:58 [ref. 2303], Heitmans et al. 1983 [ref. 5278], Burgess 1989:435 [ref. 12860], Rapp Py-Daniel 1989:236 [ref. 13470], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:25 [ref. 27178], Fisch-Muller in Reis et al. 2003:391 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644] as Castelnau 1855, Rapp Py-Daniel & Zuanon 2005:571 [ref. 28565], Ferraris 2007:278 [ref. 29155], Lujan et al. 2009:50 [ref. 30056]). Current status: Valid as Parancistrus Bleeker 1862. Loricariidae: Hypostominae.

Parasturisoma Miranda Ribeiro [A. de] 1911:109 Neut. Loricaria (Rineloricaria) brevirostris Eigenmann & Eigenmann 1889. Type by monotypy. •Synonym of Sturisoma Swainson 1838 -- (Isbrücker 1980:93 [ref. 2303], Isbrücker 2002:25 [ref. 27178], Ferraris in Reis et al. 2003:345 [ref. 27061], Ferraris 2007:298 [ref. 29155], Londoño-Burbano & Reis 2021:S1 [ref. 38183], Cardoso et al. 2023:521 [ref. 40571], Londoño-Burbano & Britto 2023:3 [ref. 40709]). Current status: Synonym of Sturisoma Swainson 1838. Loricariidae: Loricariinae.

Pareiorhaphis Miranda Ribeiro [A. de] 1918:106 Fem. Hemipsilichthys calmoni [cameroni] Steindachner 1907. Type by subsequent designation. The type species was initially spelled cameroni; see account of cameroni. Earliest type designation is Regan 1920:14 [Zoological Record for 1918] and Jordan 1923:153 [ref. 2421] as Hemipsilichthys calmoni Ribeiro (see Derijst 1996:62 [ref. 22356]). Hemipsilichthys duseni was designated type by Gosline 1947:102 [ref. 1857]. Although confusing, apparently calmoni of Miranda Ribeiro is calmoni Steindachner; see Derijst 1996:62 [ref. 22356]. Treated as valid by Isbrücker 1980:13 [ref. 2303] and Burgess 1989:430 [ref. 12860] but with type as duseni; calmoni is placed by Isbrücker in Hemispilichthys which makes Pareiorhaphis a junior synonym of Hemipsilichthys. •Synonym of Hemipsilichthys Eigenmann & Eigenmann 1889 -- (Isbrücker 2002:15 [ref. 27178], Weber in Reis et al. 2003:353 [ref. 27061]). •Valid as Pareiorhaphis Miranda Ribeiro 1918 -- (Cramer et al. 2007:56 [ref. 29959] and polyphyletic, Ferraris 2007:279 [ref. 29155], Pereira et al. 2007:444 [ref. 29466], Pereira et al. 2010:33 [ref. 30753], Roxo et al. 2012:1 [ref. 31839], Roxo et al. 2012:37 [ref. 32073], Pereira & Britto 2012:519 [ref. 32198], Pereira et al. 2012:539 [ref. 32218], Pereira & Zanata 2014:35 [ref. 33256], Pereira et al. 2015:556 [ref. 34007], Pereira et al. 2016:443 [ref. 34623], Bertaco et al. 2016:419 [ref. 34561], Pereira & Reis 2017:75 [ref. 35307], Pereira et al. 2017:1 [ref. 35608], Pereira et al. 2018:632 [ref. 36274], Oliveira & Oyakawa 2019:401 [ref. 36657], Pereira & Reis 2022:1 [ref. 39732], Pereira et al. 2024:69 [ref. 40883]). Current status: Valid as Pareiorhaphis Miranda Ribeiro 1918. Loricariidae: Hypoptopomatinae.

Pareiorhina Gosline [W. A.] 1947:104 Fem. Rhinelepis rudolphi Miranda Ribeiro 1911. Type by original designation (also monotypic). •Valid as Pareiorhina Gosline 1947 -- (Isbrücker 1980:15 [ref. 2303], Burgess 1989:430 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:25 [ref. 27178], Weber in Reis et al. 2003:365 [ref. 27061], Bockmann & Ribeiro 2003:231 [ref. 27391], Armbruster 2004:58 [ref. 27644], Chamon et al. 2005:550 [ref. 28313], Ferraris 2007:281 [ref. 29155], Roxo et al. 2012:37 [ref. 32073], Roxa et al. 2012:64 [ref. 32231], Silva et al. 2013:65 [ref. 32763], Azevedo-Santos & Roxo 2015:377 [ref. 33717], Silva et al. 2016:381 [ref. 34417], Pereira & Reis 2017:76 [ref. 35307]). Current status: Valid as Pareiorhina Gosline 1947. Loricariidae: Hypoptopomatinae.

Parotocinclus (subgenus of Hisonotus) Eigenmann [C. H.] & Eigenmann [R. S.] 1889:41 Masc. Otocinclus maculicauda Steindachner 1877. Type by monotypy. See Le Bail et al. 2000:262 [ref. 24549]. •Valid as Parotocinclus Eigenmann & Eigenmann 1889 -- (Garavello 1976 [ref. 7249], Isbrücker 1980:80 [ref. 2303], Schaefer 1988:182 [ref. 6236], Garavello 1988:117 [ref. 6853], Burgess 1989:438 [ref. 12860], Schaefer 1991:2 [ref. 18926], Schaefer & Provenzano 1993 [ref. 20828], Lacerda & Evers 1996:88 [ref. 22351], Schaefer 1997:41 [ref. 23213], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Schaefer in Reis et al. 2003:326 [ref. 27061], Garavello & Britski 2003:253 [ref. 27469], Gauger & Buckup 2005:509 [ref. 28562], Cramer et al. 2007:56 [ref. 29959] as polyphyletic, Ferraris 2007:281 [ref. 29155], Sarmento-Soares et al. 2009:191 [ref. 30254], Britski & Garavello 2009:60 [ref. 30260], Martins & Langeani 2011:76 [ref. 31235], Garvalho & Reis 2011:1 [ref. 31240], Lehmann A. & Reis 2012:56 [ref. 32074], Lehmann A. et al. 2013:435 [ref. 32919], Ramos et al. 2013:787 [ref. 33028]; Lehmann A. et al. 2014:27 [ref. 33225], Lehmann A. et al. 2015:47 [ref. 33723], Ramos et al. 2016:[1] [ref. 34352], Roxo et al. 2016:125 [ref. 34921], Roxo et al. 2017:260 [ref. 35139], Ramos et al. 2017:[1] [ref. 35268], Lehmann A. et al. 2018:584 [ref. 36321], Roxo et al. 2019:346 [ref. 36855], Pereira et al. 2019:597 [ref. 37052], Silva-Junior et al. 2020:1 [ref. 37598], Lehmann A. et al. 2020:1 [ref. 37693], Lehmann A. & Reis 2021:449 [ref. 38354], Ramos et al. 2021:1 [ref. 38561], Lehmann A. et al. 2022:69 [ref. 39041], Silva-Junior & Zanata 2022:1 [ref. 39783]). Current status: Valid as Parotocinclus Eigenmann & Eigenmann 1889. Loricariidae: Hypoptopomatinae.

Paulasquama Armbruster [J. W.] & Taphorn [D. C.] 2011:46 Fem. Paulasquama callis Armbruster & Taphorn 2011. Type by original designation. •Valid as Paulasquama Armbruster & Taphorn 2011. Current status: Valid as Paulasquama Armbruster & Taphorn 2011. Loricariidae: Hypostominae.

Peckoltia Miranda Ribeiro [A. de] 1912:7 Fem. Chaetostomus vittatus Steindachner 1881. Type by subsequent designation. Type designated by Gosline 1945:85 [ref. 13558]; see Isbrücker 1980:53 [ref. 2303]. See also Peckoltichthys Miranda Ribeiro 1917. Correct spelling for genus of type species is Chaetostoma. Ferraris 2007:283 [ref. 29155] regards type designation by monotypy [needs checking]. •Valid as Peckoltia Miranda Ribeiro 1912 -- (Isbrücker 1980:53 [ref. 2303], Heitmans et al. 1983:33 [ref. 5278], Burgess 1989:434 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster 2002:86 [ref. 25891], Isbrücker 2002:25 [ref. 27178], Cardoso & Lucinda 2003:82 [ref. 26858], Fisch-Muller in Reis et al. 2003:392 [ref. 27061], Armbruster 2003:1 [ref. 27434], Armbruster 2004:53, 59 [ref. 27644], Armbruster & Werneke 2005:1 [ref. 28101], Ferraris 2007:283 [ref. 29155], Armbruster 2008:5 [ref. 29740], Zawadzki et al. 2010:723 [ref. 31074], de Oliveira et al. 2010:45 [ref. 30929], de Oliveira et al. 2012:547 [ref. 32202], Lujan et al. 2014:16 [ref. 32454] as Pecoltia clade, Armbruster et al. 2015:97 [ref. 33670], Armbruster & Lujan 2016:106 [ref. 34264]). Current status: Valid as Peckoltia Miranda Ribeiro 1912. Loricariidae: Hypostominae.

Peckoltichthys Miranda Ribeiro [A. de] 1917:49 Masc. Peckoltichthys filicaudatus Miranda Ribeiro 1917. Type by monotypy. Regarded by Isbrücker 1980:53 [ref. 2303] as an unneeded replacement for and objective synonym of Peckoltia Miranda Ribeiro 1912 with type as vittatus, but there is no evidence in the proposal in 1917 that this was a replacement name; type is apparently filicaudatus by being a replacement name (by monotypy). •Synonym of Peckoltia Miranda Ribeiro 1912 -- (Isbrücker 2002:25 [ref. 27178], Fisch-Muller in Reis et al. 2003:392 [ref. 27061], Armbruster 2004:53 [ref. 27644], Ferraris 2007:283 [ref. 29155], Armbruster 2008:5 [ref. 29740], de Oliveira et al. 2012:548 [ref. 32202]). •Valid as Peckoltichthys Miranda Ribeiro 1917 --- (Armbruster et al. 2015:99 [ref. 33670]). Current status: Valid as Peckoltichthys Miranda Ribeiro 1917. Loricariidae: Hypostominae.

Planiloricaria (subgenus of Pseudohemiodon) Isbrücker [I. J. H.] 1971:276 Fem. Pseudohemiodon (Planiloricaria) cryptodon Isbrücker 1971. Type by original designation (also monotypic). •Valid as Planiloricaria Isbrücker 1971 -- (Isbrücker 1980:122 [ref. 2303], Isbrücker & Nijssen 1986:103 [ref. 5212], Isbrücker & Nijssen 1986 [ref. 7321], Burgess 1989:444 [ref. 12860], Isbrücker 2002:25 [ref. 27178], Ferraris in Reis et al. 2003:340 [ref. 27061], Covain & Fisch-Muller 2007:33 [ref. 29329], Ferraris 2007:285 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Planiloricaria Isbrücker 1971. Loricariidae: Loricariinae.

Plecostomus Gronow [L. T.] in Walbaum 1792:663 Masc. Acipenser plecostomus Linnaeus 1758. Type by subsequent designation. Not available if considered as nonbinominal as reproduced by Walbaum; but recognized as the valid genus by Fowler (MS). Isbrücker 1980:17-18 [ref. 2303] mentions Plecostomus Gronow in Gray 1854 and Bleeker 1862, which he synonymizes in Hypostomus Lacepède 1803. See also Plecostomus Swainson 1839 as mentioned by Isbrücker on p. 125. •In the synonymy of Hypostomus Lacepède 1803. Current status: Synonym of Hypostomus Lacepède 1803. Loricariidae: Hypostominae.

Plecostomus Gronow [L. T.] 1763:127 Masc. Not available, published in a rejected work on Official Index (Opinion 261). •In the synonymy of Hypostomus Lacepède 1803 -- (Isbrücker 2002:25 [ref. 27178], Weber in Reis et al. 2003:355 [ref. 27061], Armbruster 2004:58 [ref. 27644] dated 1754). Suppressed. Current status: Synonym of Hypostomus Lacepède 1803. Loricariidae: Hypostominae.

Plecostomus (subgenus of Loricaria) Swainson [W.] (ex Gronow) 1839:304 Masc. Loricaria maculata Bloch 1794. Type by monotypy. Apparently available; it predates Loricariichthys Bleeker 1862 (Isbrücker 1980:125 [ref. 2303]). Not treated as valid before 1899 and, therefore, permanently suppressed. •In the synonymy of Loricariichthys Bleeker 1862 -- (Isbrücker 2002:25 [ref. 27178], Ferraris in Reis et al. 2003:338 [ref. 27061], Ferraris 2007:269 [ref. 29155]). Current status: Synonym of Loricariichthys Bleeker 1862. Loricariidae: Loricariinae.

Plesioptopoma Reis [R. E.], Pereira [E. H. L.] & Lehmann A. [P.] 2012:6 Fem. Plesioptopoma cuvidens Reis, Pereira & Lehmann A. 2012. Type by original designation (also monotypic). •Valid as Plesioptopoma Reis, Pereira & Lehmann A. 2012. Current status: Valid as Plesioptopoma Reis, Pereira & Lehmann A. 2012. Loricariidae: Hypoptopomatinae.

Pogonopoma (subgenus of Plecostomus) Regan [C. T.] 1904:205 Neut. Plecostomus wertheimeri Steindachner 1867. Type by subsequent designation. Type designated by Eigenmann 1910:407 [ref. 1224]. •Valid as Pogonopoma Regan 1904 -- (Isbrücker 1980:9 [ref. 2303], Burgess 1989:429 [ref. 12860], Armbruster 1998:629 [ref. 23418], Quevedo & Reis 2002:404 [ref. 26014], Isbrücker 2002:27 [ref. 27178], Weber in Reis et al. 2003:365 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:285 [ref. 29155], Bertaco et al. 2016:419 [ref. 34561]). Current status: Valid as Pogonopoma Regan 1904. Loricariidae: Rhinelepinae.

Pogonopomoides Gosline [W. A.] 1947:109 Masc. Rhinelepis parahybae Steindachner 1877. Type by original designation (also monotypic). •Valid as Pogonopomoides Gosline 1947 -- (Isbrücker 1980:15 [ref. 2303], Burgess 1989:430 [ref. 12860], Armbruster 1998:629 [ref. 23418], Isbrücker 2002:27 [ref. 27178]). •Synonym of Pogonopoma Regan 1904 -- (Quevedo & Reis 2002:404 [ref. 26014], Weber in Reis et al. 2003:366 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:285 [ref. 29155]). Current status: Synonym of Pogonopoma Regan 1904. Loricariidae: Rhinelepinae.

Pristiancistrus Fowler [H. W.] 1945:121 Masc. Pristiancistrus eustictus Fowler 1945. Type by original designation (also monotypic). •Synonym of Ancistrus Kner 1854 -- (Isbrücker 1980:66 [ref. 2303], Isbrücker 2002:27 [ref. 27178], Fisch-M98 [ref. 29155]). Current status: Synonym of Ancistrus Kner 1854. Loricariidae: Hypostominae.

Proloricaria Isbrücker [I. J. H.] in Isbrücker et al. 2001:21 Fem. Loricaria prolixa Isbrücker & Nijssen 1978. Type by original designation. •Synonym of Loricaria Linnaeus 1758 -- (Ferraris in Reis et al. 2003:337 [ref. 27061], Covain & Fisch-Muller 2007:33 [ref. 29329]). •Valid as Proloricaria Isbrücker 2001 -- (Isbrücker 2002:27 [ref. 27178], Ferraris 2007:286 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Proloricaria Isbrücker 2001. Loricariidae: Loricariinae.

Pseudacanthicus Bleeker [P.] 1862:2 Masc. Hypostomus serratus Valenciennes 1840. Type by original designation (also monotypic). Misspelled Pseudocanthicus in literature. •Valid as Pseudacanthicus Bleeker 1862 -- (Isbrücker 1980:76 [ref. 2303], Burgess 1989:438 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:27 [ref. 27178], Fisch-Muller in Reis et al. 2003:393 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:286 [ref. 20155], Chamon 2015:309 [ref. 33851], Chamon & Sousa 2016:1 [ref. 34852], Chamon & Costa e Silva 2018:499 [ref. 35821]). Current status: Valid as Pseudacanthicus Bleeker 1862. Loricariidae: Hypostominae.

Pseudancistrus Bleeker [P.] 1862:2 Masc. Hypostomus barbatus Valenciennes 1840. Type by original designation (also monotypic). •Valid as Pseudancistrus Bleeker 1862 -- (Isbrücker 1980:10 [ref. 2303], Isbrücker et al. 1988:16 [ref. 6409], Burgess 1989:429 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:27 [ref. 27178], Fisch-Muller in Reis et al. 2003:394 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Armbruster 2004:5 [ref. 27844], Lujan et al. 2007:164 [ref. 29202], Ferraris 2007:286 [ref. 20155], Armbruster & Taphorn 2008:33 [ref. 29748], De Chambrier & Montoya-Burgos 2008:45 [ref. 29881], Willink et al. 2010:40 [ref. 30670], Covain & Fisch-Muller 2012:229, 235 [ref. 31998], Silva et al. 2014:4 [ref. 33302], Lujan et al. 2014:15 [ref. 33495] as Pseudancistrus clade, Silva et al. 2015:21 [ref. 33679]). Current status: Valid as Pseudancistrus Bleeker 1862. Loricariidae: Hypostominae.

Pseudohemiodon Bleeker [P.] 1862:3 Masc. Hemiodon platycephalus Kner 1853. Type by original designation (also monotypic). •Valid as Pseudohemiodon Bleeker 1862 -- (Isbrücker 1980:120 [ref. 2303], Isbrücker & Nijssen 1986:103 [ref. 5212], Isbrücker & Nijssen 1986:40 [ref. 7321], Burgess 1989:444 [ref. 12860], Britski et al. 1999:131 [ref. 24147], Isbrücker 2002:28 [ref. 27178], Ferraris in Reis et al. 2003:340 [ref. 27061], Covain & Fisch-Muller 2007:34 [ref. 29329], Ferraris 2007:288 [ref. 29155], Rodriguez et al. 2011:882 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Bertaco et al. 2016:419 [ref. 34561], Rojas-Molina et al. 2019:1 [ref. 36866], Provenzano et al. 2022:77 [ref. 39207]). Current status: Valid as Pseudohemiodon Bleeker 1862. Loricariidae: Loricariinae.

Pseudolithoxus Isbrücker [I. J. H.] & Werner [A.] in Isbrücker et al. 2001:21 Masc. Lasiancistrus tigris Armbruster & Provenzano 2000. Type by original designation. •Valid as Pseudolithoxus Isbrücker & Werner 2001 -- (Isbrücker 2002:28 [ref. 27178], Fisch-Muller in Reis et al. 2003:394 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:288 [ref. 29155], Lujan & Birindelli 2011:45 [ref. 31408], Collins et al. 2018:[1] [ref. 35943]). Current status: Valid as Pseudolithoxus Isbrücker & Werner 2001. Loricariidae: Hypostominae.

Pseudoloricaria Bleeker [P.] 1862:3 Fem. Loricaria laeviuscula Valenciennes 1840. Type by original designation (also monotypic). •Valid as Pseudoloricaria Bleeker 1862 -- (Isbrücker & Nijssen 1976 [ref. 7075], Isbrücker 1980:124 [ref. 2303], Burgess 1989:444 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:28 [ref. 27178], Ferraris in Reis et al. 2003:340 [ref. 27061], Covain & Fisch-Muller 2007:34 [ref. 29329], Ferraris 2007:289 [ref. 29155], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Pseudoloricaria Bleeker 1862. Loricariidae: Loricariinae.

Pseudoqolus Lujan [N. K.], Cramer [C. A.], Covain [R.], Fisch-Muller [S.] & López-Fernández [H.] 2017:333 [12] Masc. Panaqolus koko Fisch-Muller & Covain 2012. Type by original designation (also monotypic). •Valid as Pseudoqolus Lujan, Cramer, Covain, Fisch-Muller & López-Fernández 2017. Current status: Valid as Pseudoqolus Lujan, Cramer, Covain, Fisch-Muller & López-Fernández 2017. Loricariidae: Hypostominae.

Pseudorinelepis Bleeker [P.] 1862:3 Fem. Rinelepis genibarbis Valenciennes 1840. Type by original designation (also monotypic). Spelled Pseudorhinelepis in reprint edition index to Jordan 1917-23. Correct original spelling for genus of type species is Rhinelepis. •Valid as Pseudorinelepis Bleeker 1862 -- (Isbrücker 1980:8 [ref. 2303], Burgess 1989:429 [ref. 12860], Armbruster 1998:631 [ref. 23418], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster & Hardman 1999:56 [ref. 23670], Quevedo & Reis 2002:409 [ref. 26014], Isbrücker 2002:28 [ref. 27178], Weber in Reis et al. 2003:366 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:289 [ref. 29155]). Current status: Valid as Pseudorinelepis Bleeker 1862. Loricariidae: Rhinelepinae.

Pseudotocinclus Nichols [J. T.] 1919:534 Masc. Pseudotocinclus intermedius Nichols 1919. Type by monotypy. •Valid as Pseudotocinclus NIchols 1919 -- (Isbrücker 1980:86 [ref. 2303], Britski & Garavello 1984:226 [ref. 5166], Burgess 1989:439 [ref. 12860], Schaefer 1991:2 [ref. 18926], Reis & Schaefer 1992:222 [ref. 17477], Schaefer 1997:41 [ref. 23213], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Isbrücker 2002:28 [ref. 27178], Schaefer in Reis et al. 2003:327 [ref. 27061], Takako et al. 2005:500 [ref. 28465], Ferraris 2007:289-290 [ref. 29155], Martins & Langeani 2011:66 [ref. 31235], Roxo et al. 2012:37 [ref. 32073] in Neoplecostominae, Pereira & Reis 2017:83 [ref. 35307] not in Neoplecostominae). Current status: Valid as Pseudotocinclus Nichols 1919. Loricariidae: Hypoptopomatinae.

Pseudotothyris Britski [H. A.] & Garavello [J. C.] 1984:232 Fem. Otocinclus obtusus Miranda Ribeiro 1911. Type by original designation. •Valid as Pseudotothyris Britski & Garavello 1984 -- (Burgess 1989:439 [ref. 12860], Schaefer 1991:2 [ref. 18926], Reis & Schaefer 1992:222 [ref. 17477], Schaefer 1997:41 [ref. 23213], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:28 [ref. 27178], Schaefer in Reis et al. 2003:327 [ref. 27061], Ferraris 2007:290 [ref. 29155], Martins et al. 2014:822, 824 [ref. 33221]). Current status: Valid as Pseudotothyris Britski & Garavello 1984. Loricariidae: Hypoptopomatinae.

Psilichthys Steindachner [F.] 1907:82 Masc. Psilichthys cameroni Steindachner 1907. Type by monotypy. Originally named as above in this abstract, name later changed to Hemipsilichthys and treated in more detail in Steindachner 1907:475, Pls. 1-2 [ref. 18797]. Objectively invalid; Psilichthys is preoccupied by Psilichthys Hall 1900 in fossil fishes. •In the synonymy of Hemipsilichthys Eigenmann & Eigenmann 1889 -- (Isbrücker 2002:28 [ref. 27178], Weber in Reis et al. 2003:353 [ref. 27061]). •Synonym of Pareiorhaphis Miranda Ribeiro 1918 -- (Pereira & Reis 2017:75 [ref. 35307]). 1°Homonym. Current status: Synonym of Pareiorhaphis Miranda Ribeiro 1918. Loricariidae: Hypoptopomatinae.

Pterosturisoma Isbrücker [I. J. H.] & Nijssen [H.] 1978:69 Neut. Harttia microps Eigenmann & Allen 1942. Type by original designation (also monotypic). •Valid as Pterosturisoma Isbrücker & Nijssen 1978 -- (Isbrücker 1980:92 [ref. 2303], Burgess 1989:440 [ref. 12860], Isbrücker 2002:28 [ref. 27178], Ferraris in Reis et al. 2003:340 [ref. 27061], Covain & Fisch-Muller 2007:34 [ref. 29329], Ferraris 2007:290 [ref. 29155], de Carvalho Paixão & Toledo-Piza 2009:565 [ref. 30675], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Londoño-Burbano & Reis 2021:61 [ref. 38183]). Current status: Valid as Pterosturisoma Isbrücker & Nijssen 1978. Loricariidae: Loricariinae.

Pterygoplichthys Gill [T. N.] 1858:408 Masc. Hypostomus duodecimalis Valenciennes 1840. Type by subsequent designation. Type designated by Bleeker 1862:2 [ref. 393] and 1863:78 [ref. 401] (with genus misspelled Pterygophlichtys). •Valid as Pterygoplichthys Gill 1858 -- (Isbrücker 1980:39 [ref. 2303], Burgess 1989:433 [ref. 12860], López & Miquelarena 1991:37 [ref. 23548], Weber 1991 [ref. 19114], Weber 1992:3 [ref. 19714], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:28 [ref. 27178], Weber in Reis et al. 2003:366 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644], Armbruster & Page 2006:401 [ref. 28898], Scharpf 2006:20 [ref. 30386], Ferraris 2007:290 [ref. 29155], Kottelat 2013:215 [ref. 32989], Zhang et al. 2016:211 [ref. 34477]). Current status: Valid as Pterygoplichthys Gill 1858. Loricariidae: Hypostominae.

Pyxiloricaria Isbrücker [I. J. H.] & Nijssen [H.] 1984:163 Fem. Pyxiloricaria menezesi Isbrücker & Nijssen 1984. Type by original designation (also monotypic). •Valid as Pyxiloricaria Isbrücker & Nijssen 1984 -- (Isbrücker & Nijssen 1986:103 [ref. 5212], Isbrücker & Nijssen 1986:40 [ref. 7321], Burgess 1989:444 [ref. 12860], Britski et al. 1999:132 [ref. 24147], Isbrücker 2002:28 [ref. 27178], Ferraris in Reis et al. 2003:340 [ref. 27061], Covain & Fisch-Muller 2007:34 [ref. 29329], Ferraris 2007:292 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Pyxiloricaria Isbrücker & Nijssen 1984. Loricariidae: Loricariinae.

Quiritixys Isbrücker [I. J. H.] in Isbrücker et al. 2001:21 Fem. Harttia leiopleura Oyakawa 1993. Type by original designation (also monotypic). •Valid as Quiritixys Isbrücker 2001 -- (Isbrücker 2002:28 [ref. 27178]). •Synonym of Harttia Steindachner 1877 -- (Ferraris in Reis et al. 2003:334 [ref. 27061], Ferraris 2007:240 [ref. 29155], Covain et al. 2016:513 [ref. 34066], Londoño-Burbano & Reis 2021: S1 [ref. 38183]). •Possibly valid -- (Covain & Fisch-Muller 2007:29 [ref. 29329]). Current status: Synonym of Harttia Steindachner 1877. Loricariidae: Loricariinae.

Reganella Eigenmann [C. H.] 1905:794 Fem. Hemiodon depressus Kner 1853. Type by being a replacement name. Replacement for Hemiodon Kner 1854, preoccupied by Hemiodon Swainson 1840 in Mollusca. •Valid as Reganella Eigenmann 1905 -- (Isbrücker & Nijssen 1974:216 [ref. 7126], Isbrücker 1980:123 [ref. 2303], Burgess 1989:444 [ref. 12860], Isbrücker 2002:28 [ref. 27178], Ferraris in Reis et al. 2003:341 [ref. 27061], Covain & Fisch-Muller 2007:35 [ref. 29329], Ferraris 2007:292-293 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Reganella Eigenmann 1905. Loricariidae: Loricariinae.

Rhadinoloricaria Isbrücker [I. J. H.] & Nijssen [H.] 1974:73 Fem. Loricaria macromystax Günther 1869. Type by original designation (also monotypic). •Valid as Rhadinoloricaria Isbrücker & Nijssen 1974 -- (Isbrücker & Nijssen 1986:103 [ref. 5212], Isbrücker & Nijssen 1986:40 [ref. 7321], Burgess 1989:444 [ref. 12860], Isbrücker 2002:28 [ref. 27178], Ferraris in Reis et al. 2003:341 [ref. 27061], Covain & Fisch-Muller 2007:35 [ref. 29329], Ferraris 2007:293 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Provenzano-Rizzi & Barriga-Salazar 2020:487 [ref. 37527], Crispim-Rodrigues et al. 2023:1 [ref. 40189]). Current status: Valid as Rhadinoloricaria Isbrücker & Nijssen 1974. Loricariidae: Loricariinae.

Rhinelepis Agassiz [L.] in Spix & Agassiz 1829:2, 4 Fem. Rhinelepis aspera Spix & Agassiz 1829. Type by monotypy. Spelled Rhinelepes by Swainson 1839:304 [ref. 4303], Rinelepis by Valenciennes in Cuvier & Valenciennes 1840:480 [ref. 1008], and Rhinolepis by Borodin 1927:7 [ref. 12246]. •Valid as Rhinelepis Agassiz 1829 -- (Isbrücker 1980:7 [ref. 2303], Burgess 1989:429 [ref. 12860], López & Miquelarena 1991:43 [ref. 23548], Armbruster 1998:632 [ref. 23418], Britski et al. 1999:134 [ref. 24147], Quevedo & Reis 2002:409 [ref. 26014], Isbrücker 2002:28 [ref. 27178], Weber in Reis et al. 2003:367 [ref. 27061], Armbruster 2004:53, 61 [ref. 27644], Ferraris 2007:293 [ref. 29155] with authorship as Spix & Agassiz, Bertaco et al. 2016:419 [ref. 34561]). Current status: Valid as Rhinelepis Agassiz 1829. Loricariidae: Rhinelepinae.

Rhinolekos Martins [F. de O.] & Langeani [F.] 2011:66 Masc. Rhinolekos britskii Martins & Langeani 2011. Type by original designation. •Valid as Rhinolekos Martins & Langeani 2011 -- (Roxo et al. 2015:109 [ref. 33671]). Current status: Valid as Rhinolekos Martins & Langeani 2011. Loricariidae: Hypoptopomatinae.

Rhinotocinclus Reis [R. E.] & Lehmann A. [P.] 2022:5 Masc. Parotocinclus longirostris Garavello 1988. Type by original designation. •Valid as Rhinotocinclus Reis & Lehmann A. 2022. Current status: Valid as Rhinotocinclus Reis & Lehmann A. 2022. Loricariidae: Hypoptopomatinae.

Ricola Isbrücker [I. J. H.] & Nijssen [H.] 1978:182 Masc. Loricaria macrops Regan 1904. Type by original designation (also monotypic). •Valid as Ricola Isbrücker & Nijssen 1978 -- (Isbrücker 1980:114 [ref. 2303], Isbrücker 1981:56 [ref. 5522], Burgess 1989:443 [ref. 12860], Isbrücker 2002:29 [ref. 27178], Ferraris in Reis et al. 2003:341 [ref. 27061], Ferraris 2007:293 [ref. 29155], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini). Current status: Valid as Ricola Isbrücker & Nijssen 1978. Loricariidae: Loricariinae.

Rineloricaria Bleeker [P.] 1862:3 Fem. Loricaria lima Kner 1853. Type by original designation (also monotypic). Misspelled Rhineloricaria by Eigenmann 1910:413 [ref. 1224] and others. •Valid as Rineloricaria Bleeker 1862 -- (Isbrücker 1980:103 [ref. 2303], Reis 1983 [ref. 12857], Isbrücker & Nijssen 1984 [ref. 9845], Burgess 1989:441 [ref. 12860], Malabarba 1989:155 [ref. 14217], Langeani & de Araujo 1994 [ref. 22095], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:130 [ref. 24147], Isbrücker 2002:29 [ref. 27178], Rodriguez 2001:169 [ref. 31034], Ferraris in Reis et al. 2003:341 [ref. 27061], Rodriguez & Miquelarena 2005:1 [ref. 28173], Covain & Fisch-Muller 2007:35 [ref. 29329], Ferraris 2007:293 [ref. 29155], Rodriguez & Reis 2008:333 [ref. 29630], Ghazzi 2008:100 [ref. 29636], Rapp Py-Daniel & Fichberg 2008:339 [ref. 29840], Fichberg & Chamon 2008:347 [ref. 29841], Ingenito et al. 2008:356 [ref. 29842], Rodriguez & Miquelarena 2008:1635 [ref. 29906], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Rodriguez et al. 2011:882 [ref. 31506], Vera-Alcaraz et al. 2012:285 [ref. 32034], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Bertaco et al. 2016:419 [ref. 34561], Londoño-Burbano & Urbano-Bonilla 2018:375 [ref. 36212], Costa-Silva et al. 2021:531 [ref. 38838], Costa-Silva et al. 2022:285 [ref. 39493], Chamon & Fichberg 2022:58 [ref. 39682], Mejia et al. 2023:1 [ref. 40132], Urbano-Bonilla et al. 2023:1 [ref. 40346]). Current status: Valid as Rineloricaria Bleeker 1862. Loricariidae: Loricariinae.

Schizolecis Britski [H. A.] & Garavello [J. C.] 1984:228 Fem. Microlepidogaster guntheri Miranda Ribeiro 1918. Type by original designation (also monotypic). •Valid as Schizolecis Britski & Garavello 1984 -- (Burgess 1989:439 [ref. 12860], Schaefer 1991:2 [ref. 18926], Schaefer 1997:42 [ref. 23213], Reis & Schaefer 1998:23 [ref. 23691], Schaefer 1998:377 [ref. 23692], de Pinna 1998:305 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2002:29 [ref. 27178], Schaefer in Reis et al. 2003:327 [ref. 27061], Ferraris 2007:295 [ref. 29155].). Current status: Valid as Schizolecis Britski & Garavello 1984. Loricariidae: Hypoptopomatinae.

Scobinancistrus Isbrücker [I. J. H.] & Nijssen [H.] 1989:542 Masc. Scobinancistrus pariolispos Isbrücker & Nijssen 1989. Type by original designation (also monotypic). •Synonym of Panaque Eigenmann & Eigenmann 1889 -- (Armbruster 2004:53, 59 [ref. 27644]). •Valid as Scobinancistrus Isbrücker & Nijssen 1989 -- (Burgess 1994 [ref. 21427], Burgess & Finley 1996:168 [ref. 22901], Montoya-Burgos et al. 1998:367 [ref. 23850], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:29 [ref. 27178], Fisch-Muller in Reis et al. 2003:395 [ref. 27061], Ferraris 2007:296 [ref. 29155], Chaves et al. 2023:1 [ref. 40570]). Current status: Valid as Scobinancistrus Isbrücker & Nijssen 1989. Loricariidae: Hypostominae.

Sophiancistrus Isbrücker [I. J. H.] & Seidel [I.] in Isbrücker et al. 2001:21 Masc. Hemiancistrus ucayalensis Fowler 1940. Type by original designation. •Valid as Sophiancistrus Isbrücker & Seidel 2001 -- (Isbrücker 2002:29 [ref. 27178], Isbrücker 2002:29 [ref. 27178]). •Synonym of Peckoltia Miranda Ribeiro 1912 -- (Fisch-Muller in Reis et al. 2003:392 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:283 [ref. 29155], Armbruster 2008:5 [ref. 29740]). Current status: Synonym of Peckoltia Miranda Ribeiro 1912. Loricariidae: Hypostominae.

Soromonichthys Lujan [N. K.] & Armbruster [J. W.] 2011:220 Masc. Soromonichthys stearleyi Lujan & Armbruster 2011. Type by original designation (also monotypic). •Valid as Soromonichthys Lujan & Armbruster 2011. Current status: Valid as Soromonichthys Lujan & Armbruster 2011. Loricariidae: Hypostominae.

Spatuloricaria Schultz [L. P.] 1944:287, 334 Fem. Spatuloricaria phelpsi Schultz 1944. Type by original designation (also monotypic). •Valid as Spatuloricaria Schultz 1944 -- (Isbrücker 1980:112 [ref. 2303], Burgess 1989:443 [ref. 12860], Britski et al. 1999:130 [ref. 24147], Isbrücker 2002:29 [ref. 27178], Ferraris in Reis et al. 2003:344 [ref. 27061], Ferraris 2007:296 [ref. 29155], Rodriguez et al. 2011:876 [ref. 31506], Fichberg et al. 2014:317 [ref. 33358], Covain et al. 2015:513 [22] [ref. 34066] in Loricariini, Londoño-Burbano et al. 2018:611 [ref. 36263]). Current status: Valid as Spatuloricaria Schultz 1944. Loricariidae: Loricariinae.

Spectracanthicus Nijssen [H.] & Isbrücker [I. J. H.] 1987:93 Masc. Spectracanthicus murinus Nijssen & Isbrücker 1987. Type by original designation (also monotypic). •Valid as Spectracanthicus Nijssen & Isbrücker 1987 -- (Burgess 1989:445 [ref. 12860] as Spectracanthus, Armbruster 2002:87 [ref. 25891], Isbrücker 2002:29 [ref. 27178], Fisch-Muller in Reis et al. 2003:395 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644] dated 1986, Ferraris 2007:297 [ref. 29155], Lujan et al. 2009:50 [ref. 30056], [check] Chamon & Rapp Py-Daniel 2014:2 [ref. 33224], Chamon et al. 2018:[1] [ref. 35755]). Current status: Valid as Spectracanthicus Nijssen & Isbrücker 1987. Loricariidae: Hypostominae.

Squaliforma Isbrücker [I. J. H.] & Michels [J. P.] in Isbrücker et al. 2001:22 Fem. Hypostomus horridus Kner 1854. Type by original designation. •Synonym of Hypostomus Lacepède 1803 -- (Armbruster 2004:53, 60 [ref. 27644]). •Valid as Squaliforma Isbrücker & Michels 2001 -- (Weber in Reis et al. 2003:367 [ref. 27061], Ferraris 2007:297 [ref. 29155]). •Synonym of Aphanotorulus Isbrücker & Nijssen 1983 -- (Ray & Armbruster 2016:507 [ref. 34178]). Current status: Synonym of Aphanotorulus Isbrücker & Nijssen 1983. Loricariidae: Hypostominae.

Stoneiella Fowler [H. W.] 1914:271 Fem. Stoneiella leopardus Fowler 1914. Type by original designation (also monotypic). Misspelled Stoniella by Jordan 1920:553 [ref. 4905]. •Synonym of Pseudacanthicus Bleeker 1862 -- (Isbrücker 1980:76 [ref. 2303], Isbrücker 2002:29 [ref. 27178], Fisch-Muller in Reis et al. 2003:393 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644] as Stoniella, Ferraris 2007:286 [ref. 20155]). Current status: Synonym of Pseudacanthicus Bleeker 1862. Loricariidae: Hypostominae.

Sturisoma Swainson [W.] 1838:333 et seq. Neut. Loricaria rostrata Spix & Agassiz 1829. Type by monotypy. Also in Swainson 1839:189, 304 [ref. 4303]. Misspelled Aturiosoma in literature. •Valid as Sturisoma Swainson 1838 -- (Isbrücker 1980:93 [ref. 2303], Burgess 1989:440 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850], Britski et al. 1999:129 [ref. 24147], Isbrücker 2002:29 [ref. 27178], Ferraris in Reis et al. 2003:345 [ref. 27061], Covain & Fisch-Muller 2007:36 [ref. 29329], Ferraris 2007:298 [ref. 29155], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Rodriguez et al. 2011:882 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] restricted to cis-Andean species in Loricariini, Londoño-Burbano 2018:1 [ref. 35813], Londoño-Burbano & Reis 2021:62 [ref. 38183], Londoño-Burbano & Britto 2022:1 [ref. 39789], Cardoso et al. 2023:521 [ref. 40571], Londoño-Burbano & Britto 2023:3 [ref. 40709]). Current status: Valid as Sturisoma Swainson 1838. Loricariidae: Loricariinae.

Sturisomatichthys Isbrücker [I. J. H.] & Nijssen [H.] in Isbrücker 1979:91 Masc. Oxyloricaria leightoni Regan 1912. Type by original designation. •Valid as Sturisomatichthys Isbrücker & Nijssen 1979 -- (Isbrücker 1980:92 [ref. 2303], Burgess 1989:440 [ref. 12860], Isbrücker 2002:29 [ref. 27178], Ferraris in Reis et al. 2003:346 [ref. 27061], Covain & Fisch-Muller 2007:37 [ref. 29329], Ferraris 2007:300 [ref. 29155], de Carvalho Paixão & Toledo-Piza 2009:563 [ref. 30675], Rodriguez et al. 2011:882 [ref. 31506], Covain et al. 2015:513 [22] [ref. 34066] restricted to trans-Andean species in Loricariini, Londoño-Burbano & Reis 2019:765 [ref. 37158], Londoño-Burbano & Reis 2021:62 [ref. 38183]). Current status: Valid as Sturisomatichthys Isbrücker & Nijssen 1979. Loricariidae: Loricariinae.

Thysanocara (subgenus of Xenocara) Regan [C. T.] 1906:96 Neut. Hypostomus cirrhosus Valenciennes 1836. Type by monotypy. Proposed for Xenocara cirrhosum and its allies; X. brevispinnis also described, but whether Regan placed it in the subgenus Thysanocara is unclear from text. •Objective synonym of Ancistrus Kner 1854 -- (Isbrücker 1980:66 [ref. 2303], Isbrücker 2002:30 [ref. 27178], Fisch-Muller in Reis et al. 2003:373 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:219 [ref. 29155]). Current status: Synonym of Ancistrus Kner 1854. Loricariidae: Hypostominae.

Transancistrus Lujan [N. K.], Meza-Vargas [V.] & Barriga Salazar [R. E.] 2015:657 Masc. Cordylancistrus santarosensis Tan & Armbruster 2012. Type by original designation. •Valid as Transancistrus Lujan, Meza-Vargas & Barriga Salazar 2015 -- (Provenzano 2018:407 [ref. 35789]). Current status: Valid as Transancistrus Lujan, Meza-Vargas & Barriga Salazar 2015. Loricariidae: Hypostominae.

Typupiscis Toledo [M. J.] (ex Ameghino) 2022:3 Masc. Typupiscis lujanensis Toledo 2022 (Ancistrus cirrhosus). monotypy. Not available, no formal description and typification, also described in synonymy; based on manuscript name by Florentino Ameghino on a historical photograph taken in 1874. •In synonymy of Ancistrus Kner 1854 -- (Toledo et al. 2022:1 [ref. 39266]). Current status: Synonym of Ancistrus Kner 1854. Loricariidae: Hypostominae.

Upsilodus Miranda Ribeiro [A. de] 1924:365 Masc. Upsilodus victori Miranda Ribeiro 1924. Type by monotypy. •Valid as Upsilodus Miranda Ribeiro 1924 -- (Isbrücker 1980:14 [ref. 2303], Burgess 1989:430 [ref. 12860], Isbrücker 2002:29 [ref. 27178], ). •Valid as Upsilodus Miranda Ribeiro 1924 -- (Armbruster 2004:45 [ref. 27644] without subfamily). •Synonym of Hemipsilichthys Eigenmann & Eigenmann 1889 -- (Weber in Reis et al. 2003:353 [ref. 27061], Reis et al. 2006:280 [ref. 28706], Ferraris 2007:247 [ref. 29155]). Current status: Synonym of Hemipsilichthys Eigenmann & Eigenmann 1889. Loricariidae: Delturinae.

Watawata Isbrücker [I. J. H.] & Michels [J. P.] in Isbrücker et al. 2001:22 Fem. Hypostomus microstomus Weber 1987. Type by original designation. •Valid as Watawata Isbrücker & Michels 2001 -- (Isbrücker 2002:30 [ref. 27178]). •Synonym of Hypostomus Lacepède 1803 -- (Weber in Reis et al. 2003:355 [ref. 27061], Armbruster 2004:53, 60 [ref. 27644], Ferraris 2007:250 [ref. 29155]). Current status: Synonym of Hypostomus Lacepède 1803. Loricariidae: Hypostominae.

Xenocara Regan [C. T.] 1904:195, 251 Neut. Chaetostomus latifrons Günther 1869. Type by subsequent designation. Type designated by Eigenmann 1910:410 [ref. 1224]. Correct spelling for genus of type species is Chaetostoma. •Synonym of Ancistrus Kner 1854 -- (Isbrücker 1980:66 [ref. 2303], Fisch-Muller in Reis et al. 2003:373 [ref. 27061], Isbrücker 2002:30 [ref. 27178], Armbruster 2004:53, 59 [ref. 27644], Fisch-Muller et al. 2005:570 [ref. 28242], ). Current status: Synonym of Ancistrus Kner 1854. Loricariidae: Hypostominae.

Xenomystus Lütken [C. F.] 1874:217, 220 Masc. Xenomystus gobio Lütken 1874. Type by original designation (also monotypic). Objectively invalid; preoccupied by Xenomystus Günther 1868 in fishes, replaced by Hemipsilichthys Eigenmann & Eigenmann 1889. •In the synonymy of Hemipsilichthys Eigenmann & Eigenmann 1889 -- (Isbrücker 1980:11 [ref. 2303], Pereira & Reis 2002:98 [ref. 26071], Isbrücker 2002:30 [ref. 27178], Weber in Reis et al. 2003:353 [ref. 27061], Reis et al. 2006:280 [ref. 28706], Ferraris 2007:247 [ref. 29155]). 1°Homonym. Current status: Synonym of Hemipsilichthys Eigenmann & Eigenmann 1889. Loricariidae: Delturinae.

Yaluwak Lujan [N. K.] & Armbruster [J. W.] in Lujan, Armbruster, Werneke, Teixeira & Lovejoy 2019:16 Masc. Yaluwak primus Lujan, Armbruster & Werneke 2019. Type by original designation (and monotypic). •Valid as Yaluwak Lujan & Armbruster 2019. Current status: Valid as Yaluwak Lujan & Armbruster 2019. Loricariidae: Hypostominae.

Zonancistrus Isbrücker [I. J. H.] in Isbrücker et al. 2001:23 Masc. Ancistrus brachyurus Kner 1854. Type by original designation. •Valid as Zonancistrus Isbrücker 2001 -- (Isbrücker 2002:30 [ref. 27178]). •Synonym of Dekeyseria Rapp Py-Daniel 1985 -- (Fisch-Muller in Reis et al. 2003:383 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:234 [ref. 29155]). Current status: Synonym of Dekeyseria Rapp Py-Daniel 1985. Loricariidae: Hypostominae.