boulengeri, Plecostomus Eigenmann [C. H.] & Kennedy [C. H.] 1903:502 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 55; ref. 1260] Mato Grosso, Brazil or Asunción, Paraguay. Holotype: CAS 58554 [ex IU 9868]. Paratypes: CAS 58555 [ex IU 9869] (1). Type catalog: Ferraris 2007:252 [ref. 29155]. See Britski et al. 1998:135 [ref. 24147]. •Valid as Hypostomus boulengeri (Eigenmann & Kennedy 1903) -- (Isbrücker 1980:20 [ref. 2303], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Weber in Reis et al. 2003:356 [ref. 27061], Armbruster 2004:79 [ref. 27644], Ferraris 2007:252 [ref. 29155], Chiachio et al. 2008:610 [ref. 30127], Zawadzki et al. 2010:719 [ref. 31074], Koerber 2011:5 [ref. 31122], Cardoso et al. 2012:77 [ref. 32154], Zawadzki et al. 2014:102 [ref. 33233], Martins et al. 2014:7 [ref. 33617], Koerber 2014:9 [ref. 33621], Sarmiento et al. 2014:191 [ref. 35004], Mirande & Koerber 2015:42 [ref. 35117], Cardoso et al. 2016:16 [ref. 34373], Zawadzki et al. 2016:272 [ref. 34908], Koerber et al. 2017:61 [ref. 35267], Zawadzki et al. 2017:571 [ref. 35666], Zawadzki et al. 2018:[16] [ref. 35944], Zawadzki et al. 2019:[11] [ref. 37170], Zawadzki et al. 2021:110 [ref. 38157]). Current status: Valid as Hypostomus boulengeri (Eigenmann & Kennedy 1903). Loricariidae: Hypostominae. Distribution: Paraguay River basin: Brazil, Bolivia, Argentina and Paraguay. Habitat: freshwater.