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

Species in the genus Imparfinis: [ 23 ] records

arceae, Imparfinis Silva [G. S. C.], Sabaj Pérez [M. H.], Carvalho [K. R. de] & Oliveira [C.] 2025:145, Figs. 1A, 3, 4 [Ichthyology & Herpetology v. 113 (no. 1); ref. 42054] Córrego Formoso, Suiá-Missu drainage, upper Xingu River basin, Canarana, Mato Grosso State, Brazil, 13°17'24"S, 52°15'03"W. Holotype: MCP 55325. Paratypes: ABAM-I, ANSP, LBP, MZUSP.Plus additional non-type material. •Valid as Imparfinis arceae Silva, Sabaj Pérez, Carvalho & Oliveira 2025. Current status: Valid as Imparfinis arceae Silva, Sabaj Pérez, Carvalho & Oliveira 2025. Heptapteridae: Heptapterinae. Distribution: South America: upper Xingu River basin, Mato Grosso State, Brazil. Habitat: freshwater.

cochabambae, Pimelodella Fowler [H. W.] 1940:80, Figs. 35-37 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 92; ref. 1436] Boca Chapare, Cochabamba, Bolivia. Holotype (unique): ANSP 69066. Type catalog: Böhlke 1984:141 [ref. 13621], Ferraris 2007:185 [ref. 29155]. References 27366 and 28131 [Argentina localities] do not apply to this species (Koerber 16 July 2008). •Valid as Pimelodella cochabambae Fowler 1940 -- (Burgess 1989:280 [ref. 12860], López et al. 2003:62 [ref. 27366], Menni 2004:83 [ref. 28131]). •Valid as Imparfinis cochabambae (Fowler 1940) -- (Mees & Cala 1989:386 [ref. 14277], Burgess 1989:277 [ref. 12860], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:185 [ref. 29155], Almirón et al. 2007:823 [ref. 29443], Ortega-Lara et al. 2011:791 [ref. 31716], Sarmiento et al. 2014:191 [ref. 35004], Chuctaya et al. 2022:41 [ref. 42137], Silva et al. 2025:150 [ref. 42054]). Current status: Valid as Imparfinis cochabambae (Fowler 1940). Heptapteridae: Heptapterinae. Distribution: South America: Beni River drainage, Madeira River basin (Bolivia, Brazil, Peru). Habitat: freshwater.

guttatus, Nannorhamdia Pearson [N. E.] 1924:11, Pl. 2 (figs. 1-2) [Indiana University Studies v. 11 (no. 64); ref. 3396] Río Popoi, upper Río Beni, Bolivia. Holotype: CAS 63689 [ex IU 17268]. Paratypes: CAS 63690 [ex IU 17268] (1), UMMZ 66483 [ex IU 17268] (1). Type catalog: Ferraris 2007:185 [ref. 29155]. •Valid as Imparfinis guttatus (Pearson 1924) -- (Mees & Cala 1989:382 [ref. 14277], Burgess 1989:277 [ref. 12860], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:185 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Sarmiento et al. 2014:191 [ref. 35004], Meza-Vargas et al. 2021:24 [ref. 39298], Aguilera et al. 2022:[6] 1253 [ref. 40881], Cortés-Hernández et al. 2023:13 [ref. 40341], Koerber et al. 2023:3 [ref. 40368], Koerber et al. 2024:6 [ref. 41721], Silva et al. 2025:150 [ref. 42054]). Current status: Valid as Imparfinis guttatus (Pearson 1924). Heptapteridae: Heptapterinae. Distribution: South America: Mamoré and Pilcomayo River drainages, Amazon and Paraguay River basins (Argentina, Bolivia and Peru). Habitat: freshwater.

hasemani, Imparfinis Steindachner [F.] 1915:59 [45], Figs. 1-3 [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Klasse. v. 93; ref. 4244] Rio Surumú near Serra do Mello; Rio Branco at Bem Querer; Rio Tapajos near Santarém, Pará State, Brazil. Syntypes: (several) NMW 46093 (1). Type catalog: Ferraris 2007:185 [ref. 29155]. On p. 45 of separate; also in Steindachner 1917 [ref. 15259]. Species not listed in earlier abstract [ref. 18909]. •Valid as Imparfinis hasemani Steindachner 1915 -- (Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:185 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Castro & Wosiacki 2019:470 [ref. 37139], Taphorn et al. 2022:48 [ref. 41297], Silva et al. 2025:150 [ref. 42054]). Current status: Valid as Imparfinis hasemani Steindachner 1915. Heptapteridae: Heptapterinae. Distribution: South America: Branco and Tapajós River basins (Brazil and Guyana). Habitat: freshwater.

lepturus, Imparfinis Silva [G. S. C.], Reia [L.], Morimoto [C. K.], Benine [R. C.] & Oliveira [C.] 2023:365, Figs. 3, 6a [Zootaxa 5249 (no. 3); ref. 40041] Rio Corrente, upper Paraná River basin, Aporé, Goiás, Brazil, 18°30'50.7"S, 52°05'46.4"W. Holotype: MZUSP 127602. Paratypes: LBP 25732 (16), 32018 (12). •Valid as Imparfinis lepturus Silva, Reia, Morimoto, Benine & Oliveira 2023 -- (Silva et al. 2025:150 [ref. 42054]). Current status: Valid as Imparfinis lepturus Silva, Reia, Morimoto, Benine & Oliveira 2023. Heptapteridae: Heptapterinae. Distribution: South America: Corrente River drainage, upper Paraná River basin, Goiás, Brazil. Habitat: freshwater.

lineata, Nannorhamdia Bussing [W. A.] 1970:1, Fig. 1 [Contributions in Science (Los Angeles) No. 196; ref. 7720] Quebrada 36, 12 kilometers west of Pueblo River Claro at Interamerican Highway, Puntarenas Province, Costa Rica, elevation 80 meters. Holotype: LACM 30688-1. Paratypes: ANSP 114839 [ex UCR 111-10] (2); BMNH 1967.9.29 [or 21].1-2 (2); LACM 30688-2 (3); UCR 111-10 (orig. 18 now 26); USNM 194230 (1), 204694 (2). Type catalog: Böhlke 1984:142 [ref. 13621], Ferraris & Vari 1992:34 [ref. 19771], Ferraris 2007:185 [ref. 29155], Angulo et al. 2015:376 [ref. 35212]. •Valid as Nannorhamdia lineata Bussing 1970 -- (Bussing 1987:101 [ref. 22927]). •Valid as Imparfinis lineatus (Bussing 1970) -- (Mees & Cala 1989:382 [ref. 14277], Burgess 1989:277 [ref. 12860], Bussing 1998:144 [ref. 24179], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:185 [ref. 29155], Ortega-Lara et al. 2011:791 [ref. 31716], Angulo et al. 2013:993 [ref. 33194]). Current status: Valid as Imparfinis lineatus (Bussing 1970). Heptapteridae: Heptapterinae. Distribution: Streams in Puntarenas Province, Costa Rica. Habitat: freshwater.

longicauda, Pimelodus (Rhamdia) Boulenger [G. A.] 1887:275, Pl. 20 (fig. 2) [Proceedings of the Zoological Society of London 1887 (pt 2) (art. 2) (for 1 Mar. 1887); ref. 532] Canelos, eastern Ecuador. Syntypes: BMNH 1880.12.8.100-104 (5). Type catalog: Ferraris 2007:185 [ref. 29155]. The specific name is an indeclinable noun. •Valid as Rhamdia longicauda (Boulenger 1887) -- (Ovchynnyk 1967:35 [ref. 37559], Ortega & Vari 1986:15 [ref. 9708], Burgess 1989:279 [ref. 12860]). •Valid as Imparfinis longicauda (Boulenger 1887) [often seen as longicaudus] -- (Mees & Cala 1989:383 [ref. 14277], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:185 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Barriga Salazar 2014:114 [ref. 35745], Castro & Wosiacki 2019:471 [ref. 37139], Deprá et al. 2023:147 [ref. 39829], Silva et al. 2025:150 [ref. 42054]). Current status: Valid as Imparfinis longicauda (Boulenger 1887). Heptapteridae: Heptapterinae. Distribution: South America: Partaza River drainage, Napo River basin (Ecuador) and Rio Corrente (Brazil). Habitat: freshwater.

microps, Imparfinis Eigenmann [C. H.] & Fisher [H. G.] in Eigenmann 1916:82 [Annals of the Carnegie Museum v. 10 (nos 1-2) (art. 6); ref. 1233] Río Negro at Villavicencio, Colombia. Holotype: FMNH 57793 [ex CM 6776 (78 mm), not 8778]. Non-types: FMNH (5). Type catalog: Henn 1928:76 [ref. 12305], Ibarra & Stewart 1987:49 [ref. 12367], Ferraris 2007:186 [ref. 29155]. Described from one specimen but Eigenmann 1922 mentions paratypes. •Not in genus Imparfinis, probably near Heptapterus -- (Mees & Cala 1989:382 [ref. 14277]). •Valid as Imparfinis microps Eigenmann & Fisher 1916 -- (Burgess 1989:277 [ref. 12860], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:791 [ref. 31716], DoNascimiento et al. 2017:90 [ref. 35633], Urbano-Bonilla et al. 2018:79 [ref. 35773], Cortés-Hernández et al. 2023:13 [ref. 40341], Moreno-Burbano et al. 2025:23 [ref. 42549]). Current status: Valid as Imparfinis microps Eigenmann & Fisher 1916. Heptapteridae: Heptapterinae. Distribution: South America: Meta River basin (Colombia) endemic. IUCN (2022): Least Concern. Habitat: freshwater.

minuta, Rhamdia Lütken [C. F.] 1874:35 [7] [Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger og dets Medlemmers Arbeider (Kjøbenhavn) 1874 (no. 1); ref. 2855] Rio das Velhas, Minas Gerais State, Brazil. Syntypes: ZMUC 325x (1), ZMUC 327x (1), ZMUC 328 (1). Type catalog: Nielsen 1974:51 [ref. 9588], Ferraris 2007:186 [ref. 29155]. On p. 7 of separate. Also described in Lütken 1875:179 (and p. VIII of summary), Pl. 3 (fig. 6) [ref. 19674]. •Valid as Imparfinis minutus (Lütken 1874) -- (Mees 1986:319 [ref. 5693], Mees & Cala 1989:382 [ref. 14277], Burgess 1989:277 [ref. 12860], Casatti & Castro 1998:232 [ref. 23663], Le Bail et al. 2000:130 [ref. 24549]). •Valid as Imparfinnis minutus (Lütken 1875) -- (Britski 2001:20 [ref. 26046], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Castro & Wosiacki 2019:471 [ref. 37139], Silva et al. 2020:10 [ref. 37809], Silva et al. 2023:372 [ref. 40041], Sarmento-Soares et al. 2024:559 [ref. 42662], Vieira-Guimarães et al. 2024:44 [ref. 41258]). Current status: Valid as Imparfinis minutus (Lütken 1874). Heptapteridae: Heptapterinae. Distribution: South America: São Francisco River basin, Minas Gerais and Rio de Janeiro states (Brazil). IUCN (2022): Least Concern. Habitat: freshwater.

mirini, Imparfinis Haseman [J. D.] 1911:318, Pl. 47 [Annals of the Carnegie Museum v. 7 (nos 3-4) (17); ref. 2047] Above the falls of Rio Piracicaba-mirini, near Piracicaba, Brazil. Holotype: FMNH 54335 [ex CM 2981]. Paratypes: CAS 63634 [ex IU 13329] (1), FMNH 54336-37 (3, 3). Type catalog: Henn 1928:76 [ref. 12305], Ibarra & Stewart 1987:49 [ref. 12367], Ferraris 2007:186 [ref. 29155]. •Valid as Cetopsorhamdia mirini (Haseman 1911) -- (Burgess 1989:277 [ref. 12860]). •Valid as Imparfinis mirini Haseman 1911 -- (Mees & Cala 1989:384 [ref. 14277], Castro & Casatti 1997:342 [ref. 23333], Casatti et al. 2001:5 [ref. 25929], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Castro & Wosiacki 2019:471 [ref. 37139], Azevedo-Santos et al. 2020:6 [ref. 39606], dos Reis et al. 2020:466 [ref. 38364], Silva et al. 2023:368 [ref. 40041], Silva et al. 2025:151 [ref. 42054]). Current status: Valid as Imparfinis mirini Haseman 1911. Heptapteridae: Heptapterinae. Distribution: South America: upper Araguaia and Paraná River basins (Brazil). Habitat: freshwater.

mishky, Imparfinis Almirón [A. E.], Casciotta [J. R.], Bechara [J. A.], Ruíz Díaz [F. J.], Bruno [C.], d'Ambrosio [S.], Solimano [P.] & Soneira [P.] 2007:818, Figs. 1-2 [Revue Suisse de Zoologie v. 114 (no. 4); ref. 29443] Esteros del Iberá, río Corriente, Capitá Miní, 28°53'15.3"S, 58°22'02.7"W, Río Paraná basin, Argentina. Holotype: MACN-ict 8973. Paratypes: Al 208 (1), 209 (1), 210 (17, 1 c&s); MHNG 2690.001 (2); MLP 10467 [ex Al 207] (3). Type catalog: Nadalin & López 2015:8 [ref. 34112]. •Valid as Imparfinis mishky Almirón, Casciotta, Bechara, Ruíz Díaz, Bruno, d'Ambrosio, Solimano & Soneira 2007 -- (Koerber 2011:6 [ref. 31122], Ortega-Lara et al. 2011:778 [ref. 31716], Koerber 2014:7 [ref. 33621], Koerber & Litz 2014:3 [ref. 34967], Mirande & Koerber 2015:34 [ref. 35117], Bertaco et al. 2016:417 [ref. 34561], Koerber & Litz 2016:4 [ref. 35098], Nión et al. 2016:33 [ref. 35565] dated 1995, Koerber et al. 2020:7 [ref. 37480], Koerber et al. 2021:8 [ref. 38894], Koerber et al. 2023:8 [ref. 40355], Loureiro et al. 2023:130 [ref. 40506] as Imparfinnis mishky). Current status: Valid as Imparfinis mishky Almirón, Casciotta, Bechara, Ruíz Díaz, Bruno, d'Ambrosio, Solimano & Soneira 2007. Heptapteridae: Heptapterinae. Distribution: South America: Paraná River and Uruguay River basins (Argentina and Uruguay). Habitat: freshwater.

munduruku, Imparfinis Castro [Í. S.] & Wosiacki [W. B.] 2019:462, Figs. 1-4 [Zootaxa 4701 (no. 5); ref. 37139] Igarapé Bacabal, tributary of the Rio Tapajós, Vila de Penedo, Trilha MI3, Jacareacanga Municipality, Pará State, Brazil, 5°36'40.4"S, 57°7'16.6"W. Holotype: MPEG 38784. Paratypes: MPEG, MZUSP. •Valid as Imparfinis munduruku Castro & Wosiacki 2019 -- (Silva et al. 2025:150 [ref. 42054]). Current status: Valid as Imparfinis munduruku Castro & Wosiacki 2019. Heptapteridae: Heptapterinae. Distribution: South America: Tapajós and Teles Pires River drainages, Pará, Brazil. Habitat: freshwater.

nemacheir, Nannorhamdia Eigenmann [C. H.] & Fisher [H. G.] in Eigenmann 1916:83 [Annals of the Carnegie Museum v. 10 (nos 1-2) (art. 6); ref. 1233] Girardot, Colombia. Holotype: FMNH 58127 [ex CM 7125]. Non-types: FMNH 58128 (1). Type catalog: Henn 1928:77 [ref. 12305], Ibarra & Stewart 1987:59 [ref. 12367], Ferraris 2007:186 [ref. 29155]. •Valid as Nannorhamdia nemacheir Eigenmann & Fisher 1916 -- (Galvis et al. 1997:62 [ref. 23651]). •Valid as Imparfinis nemacheir (Eigenmann & Fisher 1916) -- (Mees & Cala 1989:385 [ref. 14277], Burgess 1989:277 [ref. 12860], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:790 [ref. 31716], Barriga Salazar 2014:114 [ref. 35745], DoNascimiento et al. 2017:90 [ref. 35633], Silva et al. 2025:151 [ref. 42054]). Current status: Valid as Imparfinis nemacheir (Eigenmann & Fisher 1916). Heptapteridae: Heptapterinae. Distribution: South America: upper Amazon and Orinoco River basins, and Lake Maracaibo basin: Ecuador, Colombia, Peru and Venezuela. Habitat: freshwater.

pijpersi, Cetopsorhamdia Hoedeman [J. J.] 1961:132, Fig. 2 [Bulletin of Aquatic Biology v. 2 (no. 23); ref. 11969] Sipaliwini River, Suriname, 20 kilometers from frontier with Brazil. Holotype (unique): ZMA 102230. Type catalog: Nijssen et al. 1982:41 [ref. 19236], Ferraris 2007:186 [ref. 29155] •Valid as Imparfinis pijpersi (Hoedeman 1961) -- (Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Borstein et al. 2022:18 [ref. 39507], Silva et al. 2025:151 [ref. 42054]). Current status: Valid as Imparfinis pijpersi (Hoedeman 1961). Heptapteridae: Heptapterinae. Distribution: South America: Corantijn River basin (Suriname). Habitat: freshwater.

piperatus, Imparfinis Eigenmann [C. H.] & Norris [A. A.] 1900:352 [Revista do Museu Paulista v. 4; ref. 1264] São Paulo State, Brazil. Holotype (unique): CAS 63636 [ex IU 9298]. Type catalog: Ferraris 2007:186 [ref. 29155]. •Valid as Imparfinis piperatus Eigenmann & Norris 1900 -- (Mees & Cala 1989:382 [ref. 14277], Burgess 1989:277 [ref. 12860], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716], Castro & Wosiacki 2019:471 [ref. 37139], Silva et al. 2023:368 [ref. 40041], Sarmento-Soares et al. 2024:559 [ref. 42662], Silva et al. 2025:151 [ref. 42054]). Current status: Valid as Imparfinis piperatus Eigenmann & Norris 1900. Heptapteridae: Heptapterinae. Distribution: South America: Rio Tietê and Paraíba do Sul basins, São Paulo and Rio de Janeiro states (southeastern Brazil). IUCN (2022): Least Concern. Habitat: freshwater.

pristos, Imparfinis Mees [G. F.] & Cala [P.] 1989:391, Fig. 3 [Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen (Series C, Biological and Medical Sciences) v. 92 (no. 3); ref. 14277] Second tributary, left side, from mouth of Río Tomo, Vichada, Colombia. Holotype: ICNMHN 1401. Paratypes: ICNMHN 1402 (4); RMNH 30544 (5). Type catalog: Ferraris 2007:186 [ref. 29155], Mojica & Agudelo-Zamora 2018:46 [ref. 36127]. •Valid as Imparfinis pristos Mees & Cala 1989 -- (Burgess & Finley 1996:166 [ref. 22901], Bockmann & Guazzelli in Reis et al. 2003:414 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:791 [ref. 31716], DoNascimiento et al. 2017:90 [ref. 35633], Castro & Wosiacki 2019:471 [ref. 37139], Cortés-Hernández et al. 2023:13 [ref. 40341]). Current status: Valid as Imparfinis pristos Mees & Cala 1989. Heptapteridae: Heptapterinae. Distribution: South America: Orinoco and Amazon River basins: Brazil, Colombia and Venezuela. Habitat: freshwater.

pseudonemacheir, Imparfinis Mees [G. F.] & Cala [P.] 1989:387, Fig. 2 [Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen (Series C, Biological and Medical Sciences) v. 92 (no. 3); ref. 14277] Río Tucuragua, near Caicara, Bolívar, Venezuela. Holotype: RMNH 30489 (1 of 3, 37.5 mm SL). Paratypes: ICNMHM 1403 (4); RMNH 30487 (4), 30489 (2 of 3); ZFMK 17818-19 (2). Type catalog: Ferraris 2007:186 [ref. 29155], Herder et al. 2010:120 [ref. 31087], Mojica & Agudelo-Zamora 2018:46 [ref. 36127]. •Valid as Imparfinis pseudonemacheir Mees & Cala 1989 -- (Burgess & Finley 1996:166 [ref. 22901], Bockmann & Guazzelli in Reis et al. 2003:415 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:791 [ref. 31716], DoNascimiento et al. 2017:90 [ref. 35633], Urbano-Bonilla et al. 2018:79 [ref. 35773], Meza-Vargas et al. 2021:24 [ref. 39298], Chuctaya et al. 2022:41 [ref. 42137], Cortés-Hernández et al. 2023:13 [ref. 40341]). Current status: Valid as Imparfinis pseudonemacheir Mees & Cala 1989. Heptapteridae: Heptapterinae. Distribution: South America: Orinoco and upper Amazon River basins (Colombia, Peru and Venezuela). Habitat: freshwater.

robustus, Imparfinis Cortés-Hernández [M. Á.], López-Castaño [J. A.], Milani [N.] & DoNascimiento [C.] 2023:3, Figs. 3-4, 5b, 6 [Journal of Fish Biology v. 103 (no. 5); ref. 40341] Guayuriba River, Villavicencio, Meta, Colombia, 4°03'17.8"N, 73°45'58.2"W, elevation 480 meters. Holotype: MHNU-I 1031. Paratypes: IAVHP, ICNMHN, MHNU-I, MPUJ. Plus additional non-type material. •Valid as Imparfinis robustus Cortés-Hernández, López-Castaño, Milani & DoNascimiento 2023 -- (Moreno-Burbano et al. 2025:23 [ref. 42549]). Current status: Valid as Imparfinis robustus Cortés-Hernández, López-Castaño, Milani & DoNascimiento 2023. Heptapteridae: Heptapterinae. Distribution: South America: Apure and Meta River drainages, Orinoco River basin (Colombia and Venezuela). IUCN (2025): Not Assessed. Habitat: freshwater.

schubarti, Nannorhamdia Gomes [A. L.] 1956:404, Fig. 1 [Revista Brasileira de Biologia v. 16 (no. 4); ref. 12195] Rio Mogi Guaçu, São Paulo, Brazil. Holotype: EEBP 379. Paratypes: EEBP 380 through 396 (3, 2, 1, 2, 2, 2, 4, 1, 2, 1, 1, 3, 1, 2, 2, 2, 1). Type catalog: Ferraris 2007:186 [ref. 29155], Azevedo-Santos et al. 2023:549 [ref. 40344], Azevedo-Santos et al. 2025:136 [ref. 42375]. •Synonym of Imparfinis mirini Haseman 1911 -- (Mees & Cala 1989:384 [ref. 14277], Bockmann & Guazzelli in Reis et al. 2003:415 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:778 [ref. 31716]). •Valid as Imparfinis schubarti (Gomes 1956) -- (Burgess 1989:277 [ref. 12860], Azevedo-Santos et al. 2019:5 [ref. 36506], Castro & Wosiacki 2019:471 [ref. 37139], dos Reis et al. 2020:466 [ref. 38364], Silva et al. 2023:368 [ref. 40041], Silva-Sene et al. 2024:4 [ref. 41784] as cf. schubarti, Silva et al. 2025:151 [ref. 42054]). Current status: Valid as Imparfinis schubarti (Gomes 1956). Heptapteridae: Heptapterinae. Distribution: South America: upper Paraná River basin (Brazil). Habitat: freshwater.

spurrellii, Nannorhamdia Regan [C. T.] 1913:467 [Annals and Magazine of Natural History (Series 8) v. 12 (no. 71); ref. 3656] Río Condoto, Colombia. Holotype (unique): BMNH 1913.10.1.41. Type catalog: Ferraris 2007:186 [ref. 29155]. •Valid as Imparfinis spurrellii (Regan 1913) -- (Mees & Cala 1989:382 [ref. 14277], Burgess 1989:277 [ref. 12860], Bockmann & Guazzelli in Reis et al. 2003:415 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:791 [ref. 31716], Ortega-Lara et al. 2011:791 [ref. 31716], DoNascimiento et al. 2017:90 [ref. 35633], Silva et al. 2025:151 [ref. 42054]). Current status: Valid as Imparfinis spurrellii (Regan 1913). Heptapteridae: Heptapterinae. Distribution: South America: San Juan River basin, Colombia. Habitat: freshwater.

stictonotus, Nannorhamdia Fowler [H. W.] 1940:66, Figs. 21-22 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 92; ref. 1436] Todos Santos, Río Chapare, Bolivia. Holotype: ANSP 68892. Paratypes: ANSP 68893-907 (15, with holotype), 68908-10 (3). Type catalog: Böhlke 1984:142 [ref. 13621], Ferraris 2007:186 [ref. 29155]. •Valid as Imparfinis stictonotus (Fowler 1940) -- (Mees & Cala 1989:385 [ref. 14277], Burgess 1989:277 [ref. 12860], Lasso et al. 2001:99 [ref. 25928] as cf. stictonotus, Bockmann & Guazzelli in Reis et al. 2003:415 [ref. 27061], Ferraris 2007:186 [ref. 29155], Ortega-Lara et al. 2011:791 [ref. 31716], Barriga Salazar 2014:114 [ref. 35745], Sarmiento et al. 2014:191 [ref. 35004], DoNascimiento et al. 2017:90 [ref. 35633], Castro & Wosiacki 2019:471 [ref. 37139], Chuctaya et al. 2022:41 [ref. 42137], Cortés-Hernández et al. 2023:14 [ref. 40341]). Current status: Valid as Imparfinis stictonotus (Fowler 1940). Heptapteridae: Heptapterinae. Distribution: South America: Amazon River basin (Bolivia, Brazil, Colombia, Ecuador and Peru). Habitat: freshwater.

timana, Imparfinis Ortega-Lara [A.], Milani [N.], DoNascimiento [C.], Villa-Navarro [F. A.] & Maldonado-Ocampo [J. A.] 2011:778, Figs. 1, 5g [Neotropical Ichthyology v. 9 (no. 4); ref. 31716] Río Guarapas, in the mouth of quebrada La Quebradona, small tributary of upper río Magdalena basin, 1°45'49"N, 76°05'05" W, Município Palestina, Departamento del Huila, Colombia, elevation 1350 meters. Holotype: IAvH-P 10696. Paratypes: CZUT-IC 2389 (4); IAvH-P 7061 (9, c&s), 7062 (5), 7067 (36, 1 c&s); IMCN 1203 (1 c&s), 2003 (2); MBUCV-V-33735 (3, 1 c&s). Type catalog: DoNascimiento et al. 2016:410 [ref. 34787]. •Valid as Imparfinis timana Ortega-Lara, Milani, DoNascimiento, Villa-Navarro & Maldonado-Ocampo 2011 -- (DoNascimiento et al. 2017:91 [ref. 35633]). Current status: Valid as Imparfinis timana Ortega-Lara, Milani, DoNascimiento, Villa-Navarro & Maldonado-Ocampo 2011. Heptapteridae: Heptapterinae. Distribution: Río Guarapas, upper río Magdalena basin, Colombia. Habitat: freshwater.

usmai, Imparfinis Ortega-Lara [A.], Milani [N.], DoNascimiento [C.], Villa-Navarro [F. A.] & Maldonado-Ocampo [J. A.] 2011:782, Figs. 3-4, 5a [Neotropical Ichthyology v. 9 (no. 4); ref. 31716] Verdeda Potrerillo, quebrada Potrerilla, tributary of río Coello, río Magdalena basin, 4°16'57.9"N, 75°01'53.8"W, Município Coello, Departamento del Tolima, Colombia. Holotype: IMCN 4812. Paratypes: Many at CZUT-IC, IAvH, IMCN, MBUCV. Plus non-type material. Type catalog: DoNascimiento et al. 2016:412 [ref. 34787]. •Valid as Imparfinis usmai Ortega-Lara, Milani, DoNascimiento, Villa-Navarro & Maldonado-Ocampo 2011 -- (DoNascimiento et al. 2017:91 [ref. 35633]). Current status: Valid as Imparfinis usmai Ortega-Lara, Milani, DoNascimiento, Villa-Navarro & Maldonado-Ocampo 2011. Heptapteridae: Heptapterinae. Distribution: Upper basin of río Cauca and río Magdalena and lower río Patía, Pacific slope of Colombia. Habitat: freshwater.