affinis, Plecostomus Steindachner [F.] 1877:685 [127] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4224] Campos (21°50'S, 41°20'W), Rio Paraíba do Sul, Rio de Janeiro State, Brazil. Lectotype: NMW 44041:1. Paralectotypes: (several) ?MCZ 7818 (3), 7835 (2), 7886 (2); MSNG 8860 (2); NMW 44040 (1), 44041:2-7 (7, now 6), 44043 (8), 44044 (3), 44326 (3), 55014 (2); USNM 120428 [ex MCZ 7893] (1), 120431 [ex MCZ 8179] (1); ZSM 4843 [ex NMW 44041] (1). Type catalog: Tortonese 1963:311 [ref. 10351], Ferraris & Vari 1992:31 [ref. 19771], Ferraris 2007:251 [ref. 29155], Neumann 2011:263 [ref. 31652]. On p. 127 of separate. Lectotype selected by Mazzoni et al. 1994:5 [ref. 21507]. •Valid as Hypostomus affinis (Steindachner 1877) -- (Isbrücker 1980:18 [ref. 2303], Burgess 1989:430 [ref. 12860], Mazzoni et al. 1994:5 [ref. 21507], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2001:31 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Weber in Reis et al. 2003:355 [ref. 27061], Armbruster 2004:79 [ref. 27644] dated 1876, Ferraris 2007:251 [ref. 29155], Catelani et al. 2014:931 [ref. 37496], Cardoso et al. 2016:20 [ref. 34373], Zanata & Pitanga 2016:231 [ref. 34535], Zawadzki et al. 2016:271 [ref. 34908], Penido et al. 2023:109 [ref. 40572], Vieira-Guimarães et al. 2024:47 [ref. 41258]). Current status: Valid as Hypostomus affinis (Steindachner 1877). Loricariidae: Hypostominae. Distribution: South America: Paraíba do Sul, Doce and Mucuri River basins (eastern Brazil). Habitat: freshwater.