commersoni, Hypostomus Valenciennes [A.] 1836:Pl. 7 (fig. 2) [Voyage dans l'Amérique méridionale; ref. 20720] Río de La Plata, Montevideo, Uruguay. Holotype (unique): MNHN A-9444 (dry). Valenciennes specimens and non-types: ?BMNH 1899.24.5.1 (1, dry), ?BMNH 1899.24.5.4-3 (2, dry); MNHN A-9443 (1), A-9445 (1), A-9563 (1). Type catalog: Bertin & Estève 1950:70 [ref. 19575], Ferraris 2007:252 [ref. 29155]. See Casatti & Castro 1998:232 [ref. 23663]. Name available from plate in 1837, description in Valenciennes 1847:8 [ref. 5010]. See also Valenciennes in Cuvier & Valenciennes 1840:495 [ref. 1008]. Lectotype selected by Weber 1986:994 [ref. 8023] as MNHN 99.24.5.7 [ex A.9444] but 99.24.5.7 is a BMNH number; but technically the unique holotype is the figured specimen in Pl. 7 (fig. 2) and that may be MNHN A.9444; A.9444 and A.9443 were collected by d'Orbigny and one or the other is the type. •Valid as Hypostomus commersoni Valenciennes 1836 -- (Isbrücker 1980:21 [ref. 2303], Weber 1986:994 [ref. 8023], Malabarba 1989:152 [ref. 14217], Burgess 1989:431 [ref. 12860], Reis et al. 1990:736 [ref. 16139], López & Miquelarena 1991:20 [ref. 23548], Gómez & Chebez 1996:63 [ref. 23791], Britski et al. 1998:135 [ref. 24147], Sverlij et al. 1998:67 [ref. 27632] dated 1840, Butí & Cancino 1999:72 [ref. 25277], Zawadzki et al. 2001:914 [ref. 25469] as cf. commersonii, Isbrücker 2001:28 [ref. 25653], Miquelarena et al. 2002:79 [ref. 26517], Isbrücker 2002:18 [ref. 27178], Weber in Reis et al. 2003:357 [ref. 27061], López et al. 2003:50 [ref. 27366], Armbruster 2004:79 [ref. 27644] as commersonii 1840, Menni 2004:81 [ref. 28131], Ferraris 2007:252 [ref. 29155], Zawadzki et al. 2010:724 [ref. 31074], Garavello et al. 2012:267 [ref. 32033], Cardoso et al. 2012:77 [ref. 32154], Zawadzki et al. 2014:103 [ref. 33233], Litz & Koerber 2014:25 [ref. 33622], Zawadzki et al. 2015:56 [ref. 33866], Mirande & Koerber 2015:42 [ref. 35117], Cardoso et al. 2016:20 [ref. 34373], Bertaco et al. 2016:418 [ref. 34561], Zawadzki et al. 2016:272 [ref. 34908], Nión et al. 2016:32 [ref. 35565], Koerber et al. 2017:61 [ref. 35267], Zawadzki et al. 2017:571 [ref. 35666], Zawadzki et al. 2018:[16] [ref. 35944], Cardoso et al. 2019:[8] [ref. 36685], Zawadzki et al. 2019:[11] [ref. 37170], Reis et al. 2020:467 [ref. 38364], Loureiro et al. 2023:109 [ref. 40506], Penido et al. 2023:109 [ref. 40572], Zawadzki & Azevedo 2024:325 [ref. 41237]). Current status: Valid as Hypostomus commersoni Valenciennes 1836. Loricariidae: Hypostominae. Distribution: South America: lower Paraná River basin (including the Iguazú. Paraguay, Plata and Dulce rivers) (Brazil, Paraguay, Uruguay and Argentina). Habitat: freshwater.
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