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

Species in the genus Gastrodermus: [ 17 ] records

australe, Corydoras Eigenmann [C. H.] & Ward [D. P.] in Eigenmann, McAtee & Ward 1907:123 [Annals of the Carnegie Museum v. 4 (no. 2) (art. 7); ref. 1261] Upper rio Paraguai at Corumbá (19°00'S, 57°25'W), tributary of Rio Pilcomayo, Rio Paraguay system, Mato Grosso, Brazil. Holotype: CAS 67915 [ex IU 10129]. Paratypes: (7) AMNH 1232 (1), CAS 67916 [ex IU 10130] (orig. 5, now 1, missing), CAS 77305 [ex IU 10129] (2, now 1), FMNH 52619 [ex CM 948] (1), NMW 46698 (1), ZMB 17248 (1). Type catalog: Ibarra & Stewart 1987:27 [ref. 12367], Ferraris 2007:118 [ref. 29155]. •Questionably valid as Corydoras australis Eigenmann & Ward 1907 -- (Isbrücker 2001:221 [ref. 26805]). •Valid as Corydoras australis Eigenmann & Ward 1907 -- (Casciotta et al. 2003:128 [ref. 28130]). •Synonym of Corydoras hastatus Eigenmann & Eigenmann 1888 -- (Nijssen & Isbrücker 1980:213 [ref. 6910], Reis in Reis et al. 2003:298 [ref. 27061], Ferraris 2007:118 [ref. 29155], Tencatt et al. 2013:258 [ref. 32752], Litz & Koerber 2014:23 [ref. 33622], Mirande & Koerber 2015:40 [ref. 35117], Koerber et al. 2017:58 [ref. 35267], Grant 2019:7 [ref. 37238]). Current status: Synonym of Gastrodermus hastatus (Eigenmann & Eigenmann 1888). Callichthyidae: Corydoradinae. Habitat: freshwater.

bilineatus, Corydoras Knaack [J.] 2002:52, Figs. [Aquaristik aktuell (Germany) 4/2002; ref. 27224] Chené, Santiesteban, Santa Cruz Dept., Bolivia. Holotype: MTD F 25925. Paratypes: CIRA-UTB 1000a-c (7); MTD F 25926 (1), 25927 (1), 25928 (1), 25929 (10); ZMA 123580-82 (3); ZMB 33296-98 (8). Type catalog: Zarske 2003:24 [ref. 27474], Ferraris 2007:114 [ref. 29155] •Valid as Corydoras bilineatus Knaack 2002 -- (Reis in Reis et al. 2003:295 [ref. 27061], Ferraris 2007:114 [ref. 29155], Sarmiento et al. 2014:190 [ref. 35004], Tencatt & Ohara 2016:[12] [ref. 34353], Bono et al. 2019:21 [ref. 36480]). •Valid as Gastrodermus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus bilineatus (Knaack 2002). Callichthyidae: Corydoradinae. Distribution: South America: Madeira River basin, Bolivia. Habitat: freshwater.

elegans, Corydoras Steindachner [F.] 1876:141 [93] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4225] Amazon River at Tefé, Amazonas, Brazil. Lectotype: NMW 46729. Paralectotypes: BMNH 1889.11.14.55-60 (4 or 6); MCZ 7749 (91), 8205 (28), 36103 (2), 49375 (193, now 159), 89497 (24); MNHN 1989-0276/0279 (5); MNRJ 8547 (2); NMW 46730 (4), ?46731 (4), ?64691 (6); USNM 41531 (2), 41532 (2), 120252 (6), 216716 (10); ZMA 114.921 (10); ZMUC P30119-25 (7). Type catalog: Ferraris & Vari 1992:13 [ref. 19771], Miranda Ribeiro 1959:11 [ref. 10392], Ferraris 2007:116 [ref. 29155]. On p. 93 of separate. Lectotype selected by Nijssen & Isbrücker 1980:213 [ref. 6910]. •Valid as Corydoras elegans Steindachner 1876 -- (Nijssen & Isbrücker 1980:213 [ref. 6910], Ortega & Vari 1986:16 [ref. 9708], Burgess 1989:365 [ref. 12860], Isbrücker 2001:225 [ref. 26805], Reis in Reis et al. 2003:297 [ref. 27061] dated 1877, Knaack 2002:52 [ref. 27224] dated 1877, Ferraris 2007:116 [ref. 29155], Barriga Salazar 2014:111 [ref. 35745], Sarmiento et al. 2014:190 [ref. 35004], Tencatt & Pavanelli 2015:294 [ref. 35434], Tencatt & Ohara 2016:[13] [ref. 34353], Tencatt & Evers 2016:[11] [ref. 34387], Tencatt et al. 2016:[17] [ref. 34388], Ottoni et al. 2016:132 [ref. 34756], DoNascimiento et al. 2017:73 [ref. 35633], Bono et al. 2019:20 [ref. 36480], Meza-Vargas et al. 2021:25 [ref. 39298], Chuctaya et al. 2022:37 [ref. 42137]). •Valid as Gastrodermus elegans -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus elegans (Steindachner 1876). Callichthyidae: Corydoradinae. Distribution: South America: upper Amazon River basin (Brazil, Ecuador, Bolivia, Colombia and Peru). Habitat: freshwater.

gracilis, Corydoras Nijssen [H.] & Isbrücker [I. J. H.] 1976:91, Figs. [Tropical Fish Hobbyist v. 25 (no. 1); ref. 7380] Rio Jauna (= River Juma) at Trans-Amazonica highway, about 6°09'S, 59°55'W, tributary of Rio Aripuaña, Amazonas, Brazil (corrected locality). Holotype: ZMA 114687. Paratypes: BMNH 1976.4.27.143 (1); USNM 216074 (1); ZMA 114688-89 (1, 1); ZMH H5688 (1). Type catalog: Wilkens 1977:159 [ref. 22013], Nijssen et al. 1982:45 [ref. 19236], Ferraris 2007:118 [ref. 29155]. Type locality corrected in Nijssen & Isbrücker 1980:214 [ref. 6910], Ferraris & Vari 1992:14 [ref. 19771]. •Valid as Corydoras gracilis Nijssen & Isbrücker 1976 -- (Nijssen & Isbrücker 1980:214 [ref. 6910], Burgess 1989:366 [ref. 12860], Isbrücker 2001:226 [ref. 26805] with different locality, Reis in Reis et al. 2003:298 [ref. 27061], Ferraris 2007:118 [ref. 29155], Britto et al. 2009:687 [ref. 30609], Tencatt & Ohara 2016:[12] [ref. 34353], Ohara et al. 2016:548 [ref. 34772], Bono et al. 2019:20 [ref. 36480], Tencatt et al. 2019:[14] [ref. 36697]). •Valid as Gastrodermus gracilis -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus gracilis (Nijssen & Isbrücker 1976). Callichthyidae: Corydoradinae. Distribution: South America: middle and lower Amazon River basin, Brazil. Habitat: freshwater.

guapore, Corydoras Knaack [J.] 1961:135, Figs. 1-2 [Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin (N.F.) v. 1 (nos 1-3); ref. 6008] Main stream of upper Rio Guaporé, Rondônia, Brazil. Holotype: ZMB 21406. Paratypes: two alive mentioned in original description but apparently not preserved. Type catalog: Ferraris 2007:118 [ref. 29155]. Type information: Knaack 2003:16 [ref. 27879]. •Valid as Corydoras guapore Knaack 1961 -- (Nijssen & Isbrücker 1980:214 [ref. 6910], Burgess 1989:366 [ref. 12860], Isbrücker 2001:226 [ref. 26805], Reis in Reis et al. 2003:298 [ref. 27061], Knaack 2007:43 [ref. 29221], Ferraris 2007:118 [ref. 29155], Sarmiento et al. 2014:190 [ref. 35004], Tencatt & Pavanelli 2015:288 [ref. 35434], Tencatt & Ohara 2016:[13] [ref. 34353], Tencatt & Evers 2016:[11] [ref. 34387], Tencatt et al. 2016:[17] [ref. 34388]). •Valid as Gastrodermus guapore -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus guapore (Knaack 1961). Callichthyidae: Corydoradinae. Distribution: South America: Guaporé River drainage, western Amazon basin, Brazil and Bolivia. Habitat: freshwater.

hastatus, Corydoras Eigenmann [C. H.] & Eigenmann [R. S.] 1888:166 [Proceedings of the California Academy of Sciences (Series 2) v. 1 (pt 2); ref. 1249] Villa Bella (= Parintins, 2°38'S, 56°45'W), Amazonas, Brazil. Lectotype: MCZ 7747. Paralectotypes: MCZ 95271 [ex 7747B] (1). Type catalog: Ferraris 2007:118 [ref. 29155]. Lectotype selected by Nijssen & Isbrücker 1980:213 [ref. 6910]. •Valid as Corydoras hastatus Eigenmann & Eigenmann 1888 -- (Nijssen & Isbrücker 1980:213 [ref. 6910], Burgess 1989:366 [ref. 12860], Gómez & Chebez 1996:62 [ref. 23791], Britski et al. 1999:126 [ref. 24147], Lasso et al. 2001:98 [ref. 25928], Isbrücker 2001:227 [ref. 26805], Britto et al. 2002:733 [ref. 26546], López et al. 2003:42 [ref. 27366], Reis in Reis et al. 2003:298 [ref. 27061], Menni 2004:82 [ref. 28131], Ferraris 2007:118 [ref. 29155], Calviño & Alonso 2010:199 [ref. 30829], Tencatt et al. 2014:78 [ref. 33230], Litz & Koerber 2014:23 [ref. 33622], Sarmiento et al. 2014:190 [ref. 35004], Mirande & Koerber 2015:40 [ref. 35117], Tencatt & Pavanelli 2015:294 [ref. 35434], Tencatt & Ohara 2016:[13] [ref. 34353], Tencatt & Evers 2016:[11] [ref. 34387], Tencatt et al. 2016:[17] [ref. 34388], Ottoni et al. 2016:133 [ref. 34756], Bertaco et al. 2016:416 [ref. 34561], Ohara et al. 2016:550 [ref. 34772], Reis et al. 2016:14 [ref. 34496], Nión et al. 2016:31 [ref. 35565], Koerber et al. 2017:58 [ref. 35267], Grant 2018:26 [ref. 36057], Grant 2019:7 [ref. 37238], Loureiro et al. 2023:94 [ref. 40506]). •Valid as Gastrodermus hastatus (Eigenmann & Eigenmann 1888) -- (Dias et al. 2024:24 [ref. 41219], Koerber 2024:4 [ref. 41228], Koerber et al. 2024:4 [ref. 41721]). Current status: Valid as Gastrodermus hastatus (Eigenmann & Eigenmann 1888). Callichthyidae: Corydoradinae. Distribution: South America: Amazon and Paraguay River basins (Argentina, Bolivia, Brazil, Paraguay and Uruguay). Habitat: freshwater.

latus, Corydoras Pearson [N. E.] 1924:19, Pl. 3 (fig. 1) [Indiana University Studies v. 11 (no. 64); ref. 3396] Lagoons, Lago Rojoagua [Rogoagua], Río Beni basin, Upper Amazon system, Beni, Bolivia, elevation 500-1500 feet. Holotype (unique): CAS 36452 [ex IU 17278]. Type catalog: Ferraris 2007:119 [ref. 29155]. •Valid as Corydoras latus Pearson 1924 -- (Nijssen & Isbrücker 1980:214 [ref. 6910], Burgess 1989:366 [ref. 12860], Isbrücker 2001:228 [ref. 26805], Reis in Reis et al. 2003:299 [ref. 27061], Ferraris 2007:119 [ref. 29155], Sarmiento et al. 2014:190 [ref. 35004], Tencatt & Ohara 2016:[12] [ref. 34353], Ohara et al. 2016:548 [ref. 34772], Bono et al. 2019:19 [ref. 36480]). •Valid as Gastrodermus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus latus (Pearson 1924). Callichthyidae: Corydoradinae. Distribution: South America: Beni River drainage, western Amazon basin, Bolivia. Habitat: freshwater.

mamore, Corydoras Knaack [J.] 2002:16, Figs. [VDA Aktuell v. 1 (2003); ref. 26481] Rio Ibare, Mamoré system at Moxos, Dep. Beni, Bolivia, 14°51.131'S, 65°08.360'W, elevation 161 meters. Holotype: MTD F 26741. Paratypes: CIRA-UTB 1002 (1), MTD F 26742 (1), ZMA 123592 (1). Type catalog: Zarske 2003:24 [ref. 27474], Ferraris 2007:120 [ref. 29155]. Original as mamoré but must be corrected to mamore. Apparently was available on 11 Dec. 2002, not March 2003. •Valid as Corydoras mamore Knaack 2002 -- (Ferraris 2007:120 [ref. 29155], Sarmiento et al. 2014:190 [ref. 35004], Tencatt & Ohara 2016:[12] [ref. 34353], Yunoki et al. 2025:335 [ref. 42013]). •Valid as Gastrodermus mamore (Knaack 2002) -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus mamore (Knaack 2002). Callichthyidae: Corydoradinae. Distribution: South America: Mamoré River drainage, western Amazon basin (Bolivia) endemic. Habitat: freshwater.

nanus, Corydoras Nijssen [H.] & Isbrücker [I. J. H.] 1967:41, Pl. 5 (fig. 1) [Zoologische Mededeelingen (Leiden) v. 42 (no. 5); ref. 7981] Little tributaries of Gran-Rio between Ligoria (= Ligolio) and Awaradam Falls, Brokopondo, Suriname. Holotype: RMNH 25333. Paratypes: RMNH 25334 (4), ZMA 104642 (2). Type catalog: Nijssen et al. 1982:47 [ref. 19236], Ferraris 2007:120 [ref. 29155]. •Valid as Corydoras nanus Nijssen & Isbrücker 1967 -- (Nijssen & Isbrücker 1980:214 [ref. 6910], Burgess 1989:366 [ref. 12860], Le Bail et al. 2000:202 [ref. 24549], Isbrücker 2001:230 [ref. 26805], Knaack 2002:52 [ref. 27224], Reis in Reis et al. 2003:300 [ref. 27061], Ferraris 2007:120 [ref. 29155], Ottoni et al. 2016:133 [ref. 34756], Ohara et al. 2016:548 [ref. 34772]). •Valid as Gastrodermus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus nanus (Nijssen & Isbrücker 1967). Callichthyidae: Corydoradinae. Distribution: South America: Suriname and Maroni River basins, Suriname and Iracoubo River basin, French Guiana. Habitat: freshwater.

napoensis, Corydoras Nijssen [H.] & Isbrücker [I. J. H.] 1986:73, Figs. 25-26, 33E [Revue française d'Aquariologie Herpétologie v. 12 (no. 3) [for 1985]; ref. 8061] Lagartococha, northern tributary of Río Aguarico, between 0°39'S, 75°16'W and 0°28'S, 75°21'W, Napo, Ecuador, elevation 200-220 meters. Holotype: ZMA 119226. Paratypes: FMNH 94676 (4, now 3), MZUSP 26341 (1), Quito coll. [ex FMNH 94676] (1), USNM 270358 (2), ZMA 119227 (13). Type catalog: Ferraris & Vari 1992:14 [ref. 19771], Ferraris 2007:120 [ref. 29155]. •Valid as Corydoras napoensis Nijssen & Isbrücker 1986 -- (Burgess 1989:366 [ref. 12860], Isbrücker 2001:230 [ref. 26805], Knaack 2002:52 [ref. 27224], Reis in Reis et al. 2003:300 [ref. 27061], Ferraris 2007:120 [ref. 29155], Barriga Salazar 2014:111 [ref. 35745], Sarmiento et al. 2014:190 [ref. 35004], Ottoni et al. 2016:133 [ref. 34756], Tencatt & Ohara 2016:[13] [ref. 34353], Tencatt et al. 2016:[17] [ref. 34388], see DoNascimiento et al. 2017:[16] [ref. 35679], Bono et al. 2019:22 [ref. 36480], Meza-Vargas et al. 2021:25 [ref. 39298]). •Valid as Gastrodermus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus napoensis (Nijssen & Isbrücker 1986). Callichthyidae: Corydoradinae. Distribution: South America: upper Amazon River basin (Bolivia, Ecuador and Peru). Habitat: freshwater.

nijsseni, Corydoras elegans Sands [D. D.] 1989:45, Fig. [Practical Fishkeeping; ref. 20244] Tributary of the Rio Negro, Brazil. Syntypes: (several) RMNH 31625 and 31626 (4). Type catalog: Ferraris 2007:121 [ref. 29155]. See Isbrücker 2001:231 [ref. 26805] for figure correction. •Mention -- (Burgess & Finley 1996:168 [ref. 22901]). •Valid as Corydoras nijsseni Sands 1989 -- (Isbrücker 2001:231 [ref. 26805], Reis in Reis et al. 2003:300 [ref. 27061], Britto & Lima 2003:89 [ref. 27314], Shimabukuro-Dias et al. 2004:141 [ref. 27796] as cf. nijsseni, Ferraris 2007:121 [ref. 29155]). •Valid as Gastrodermus nijsseni -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus nijsseni (Sands 1989). Callichthyidae: Corydoradinae. Distribution: South America: Negro River basin, Brazil. Habitat: freshwater.

paucerna, Corydoras Knaack [J.] 2004:57, Figs. 1-5 [Zoologische Abhandlungen; Staatliches Museum für Tierkunde in Dresden v. 54; ref. 27989] Río Paragua, río Itenez system, Provincia J.M. Velasco, Departamento Santa Cruz, Bolivia, 13°34.384'S, 62°03.067'W. Holotype: MTD F 28466. Paratypes: CAS 219131 (2); CIRA-UTB 1080 (2); CJK uncat. (135); MTD F 28467 (1); ZMA 123.1000.732 (2); ZMB 33528 (1), 33529 (1). Type catalog: Ferraris 2007:122 [ref. 29155]. •Valid as Corydoras paucerna Knaack 2004 -- (Ferraris 2007:122 [ref. 29155], Sarmiento et al. 2014:190 [ref. 35004]). •Valid as Gastrodermus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus paucerna (Knaack 2004). Callichthyidae: Corydoradinae. Distribution: South America: Itenez River drainage, western Amazon basin, Bolivia. Habitat: freshwater.

pauciradiatus, Corydoras Weitzman [S. H.] & Nijssen [H.] 1970:129, Figs. 5, 6e [Beaufortia v. 18 (no. 233); ref. 7481] Rio Araguaia near Aruana, 14°58'S, 51°04'W, Goias State, Brazil. Holotype: USNM 191625. Paratypes: USNM 204363 (1). Type catalog: Ferraris & Vari 1992:15 [ref. 19771], Ferraris 2007:109 [ref. 29155] •Valid as Aspidoras pauciradiatus (Weitzman & Nijssen 1970) -- (Burgess 1989:364 [ref. 12860], Britto 2000:1048 [ref. 25022], Lima & Britto 2001:1010 [ref. 25818] as cf. pauciradiatus, Isbrücker 2001:217 [ref. 26805], Britto et al. 2002:733 [ref. 26546], Reis in Reis et al. 2003:292 [ref. 27061], Ferraris 2007:109 [ref. 29155], Wosiacki et al. 2014:315 [ref. 33356], Tencatt & Bichuette 2017:21 [ref. 35168], Oliveira et al. 2017:[7] [ref. 35227]). •Valid as Corydoras pauciradiatus Weitzman & Nijssen 1970 -- (Tencatt et al. 2022:7 [ref. 39729]). •Valid as Gastrodermus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus pauciradiatus (Weitzman & Nijssen 1970). Callichthyidae: Corydoradinae. Distribution: South America: upper Araguaia River basin, Brazil. Habitat: freshwater.

pestai, Corydoras Holly [M.] 1940:107 [Anzeiger der Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Klasse v. 77 (no. 15); ref. 13059] Aquarium specimen (said to be from very small water-courses of the Amazon). Holotype: Münchner Tierpark A.G. 81/1938 (destroyed in WWII). Type catalog: Ferraris 2007:116 [ref. 29155], Bogutskaya et al. 2022:74 [ref. 39277]. •Status uncertain -- (Isbrücker 2001:232 [ref. 26805]). •Synonym of Corydoras elegans Steindachner 1876 -- (Nijssen & Isbrücker 1980:213 [ref. 6910], Reis in Reis et al. 2003:297 [ref. 27061], Ferraris 2007:116 [ref. 29155]). •Synonym of Gastrodermus elegans (Steindachner 1876). Current status: Synonym of Gastrodermus elegans (Steindachner 1876). Callichthyidae: Corydoradinae. Habitat: freshwater.

pygmaeus, Corydoras Knaack [J.] 1966:168, 2 figs. [Die Aquarien- und Terrarienzeitschrift (DATZ) v. 19 (no. 6); ref. 19253] Near Calama, 8°05'S, 62°52'W, along Rio Madeira near mouth of Rio Jipiraná (= River Machado), Rondônia State, Brazil. Holotype: ZMB 21620. Paratype: ZMB 21621 (1). Type catalog: Ferraris 2007:123 [ref. 29155]. Appeared first as above, then in Knaack 1966:364 [ref. 19252]. •Valid as Corydoras pygmaeus Knaack 1966 -- (Nijssen & Isbrücker 1980:214 [ref. 6910], Burgess 1989:367 [ref. 12860], Isbrücker 2001:233 [ref. 26805], Britto et al. 2002:733 [ref. 26546], Reis in Reis et al. 2003:302 [ref. 27061], Ferraris 2007:123 [ref. 29155], Tencatt et al. 2013:258 [ref. 32752], Barriga Salazar 2014:111 [ref. 35745], Ohara et al. 2016:550 [ref. 34772], Tencatt & Ohara 2016:[13] [ref. 34353], Tencatt et al. 2016:[17] [ref. 34388], DoNascimiento et al. 2017:73 [ref. 35633], Grant 2019:7 [ref. 37238], Meza-Vargas et al. 2021:25 [ref. 39298], Chuctaya et al. 2022:37 [ref. 42137]). •Valid as Gastrodermus pygmaeus -- (Dias et al. 2024:24 [ref. 41219]). Current status: Valid as Gastrodermus pygmaeus (Knaack 1966). Callichthyidae: Corydoradinae. Distribution: South America: Amazon basin (Brazil, Colombia, Ecuador and Peru). Habitat: freshwater.

taeniatus, Corydoras Stansch [K.] 1914:326, Fig. (p. 327) [Die exotischen Zierfische in Wort und Bild; ref. 19661] Amazon River. No types known. Not available according to Nijssen & Isbrücker 1979:133 [ref. 19254]. The species is named 'Corydoras taeniatus?" in the original description, which qualifies as a conditional proposal according to Art. 11.5.1 of ICZN; as it was published before 1961 it cannot be excluded on this account alone. The description includes several diagnostic characters, as well as an illustration; therefore the species name is here considered as available. Available according to Grant 2019:5 [ref. 37238]. •Synonym of Corydoras hastatus Eigenmann & Eigenmann 1888 -- (Grant 2019:6 [ref. 37238]). Current status: Synonym of Gastrodermus hastatus (Eigenmann & Eigenmann 1888). Callichthyidae: Corydoradinae. Habitat: freshwater.

undulatus, Corydoras Regan [C. T.] 1912:217 [Annals and Magazine of Natural History (Series 8) v. 10 (no. 56); ref. 14865] La Plata, Buenos Aires, Argentina [aquarium import of doubtful origin, most likely from the Entre Ríos area, Argentina]. Holotype: BMNH 1912.7.10.5. Paratypes: BMNH 1909.9.28.3-4 (2). Type catalog: Ferraris 2007:126 [ref. 29155]. •Valid as Corydoras undulatus Regan 1912 -- (Nijssen & Isbrücker 1980:214 [ref. 6910], Malabarba 1989:147 [ref. 14217], Burgess 1989:367 [ref. 12860], Isbrücker 2001:237 [ref. 26805], Knaack 2002:52 [ref. 27224], Reis in Reis et al. 2003:304 [ref. 27061], López et al. 2003:43 [ref. 27366], Casciotta et al. 2003:129 [ref. 28130], Casciotta et al. 2003:129 [ref. 28130], Shimabukuro-Dias et al. 2004:141 [ref. 27796], Menni 2004:82 [ref. 28131], Ferraris 2007:126 [ref. 29155], Calviño & Alonso 2010:200 [ref. 30829], Litz & Koerber 2014:23 [ref. 33622], Mirande & Koerber 2015:40 [ref. 35117], Bertaco et al. 2016:416 [ref. 34561], Ohara et al. 2016:550 [ref. 34772], Nión et al. 2016:31 [ref. 35565], Grant 2018:26 [ref. 36057], Bono et al. 2019:3 [ref. 36480], Giora & Wingert 2023:63 [ref. 41026], Loureiro et al. 2023:94 [ref. 40506]). •Valid as Gastrodermus undulatus (Regan 1912) -- (Dias et al. 2024:24 [ref. 41219], Koerber 2024:4 [ref. 41228], Koerber et al. 2024:4 [ref. 41721]). Current status: Valid as Gastrodermus undulatus (Regan 1912). Callichthyidae: Corydoradinae. Distribution: South America: Paraguay, Paraná and Uruguay River basins and Laguna dos Patos (Paraguay, Argentina, Uruguay and Brazil). Habitat: freshwater.