luetkeni, Plecostomus Steindachner [F.] 1877:217 [1] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 76 (1. Abth.); ref. 14247] Rio Paraíba do Sul and tributaries, Rio de Janeiro State, Brazil. Lectotype: NMW 44196:1. Paralectotypes: BMNH 1889.11.14.50 (1); ?MCZ 7866 (1), 88208-09 (12, 5); MNHN 1889-0288 (1); NMW 44190 or 44198 (1), 44196:2-7 (6), 44199 (4), 45014 (3). On p. 1 of separate. Species originally spelled lütkeni. Lectotype selected by Mazzoni et al. 1994:8, 10 [ref. 21507]. •Synonym of Hypostomus auroguttatus Kner 1854 -- (Weber in Reis et al. 2003:356 [ref. 27061], Ferraris 2007:251 [ref. 29155], Litz & Koerber 2014:25 [ref. 33622]). •Valid as Hypostomus luetkeni (Steindachner 1877) -- (Isbrücker 1980:27 [ref. 2303], Burgess 1989:431 [ref. 12860], López & Miquelarena 1991:31 [ref. 23548], Mazzoni et al. 1994:8 [ref. 21507], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Armbruster 2004:79 [ref. 27644], Cardoso et al. 2012:77 [ref. 32154], Zawadzki et al. 2015:57 [ref. 33866], Zawadzki et al. 2016:272 [ref. 34908], Nión et al. 2016:32 [ref. 35565], Azevedo et al. 2021:9 [ref. 38203]). Current status: Valid as Hypostomus luetkeni (Steindachner 1877). Loricariidae: Hypostominae. Distribution: South America: Paraíba do Sul and tributaries (Brazil and Uruguay). Habitat: freshwater.