isbrueckeri, Hypostomus Reis [R. E.], Weber [C.] & Malabarba [L. R.] 1990:752, Figs. 1, 21-23 [Revue Suisse de Zoologie v. 97 (no. 3); ref. 16139] Rio Conceição, Ijui, Rio Grande do Sul, Brazil. Holotype: MCP 10488. Paratypes: MCP 10486 (4), 10494-95 (4, 1), 10861-62 (1, 2), 10885 (1), 12045 (2), 12305-08 (2, 7, 4, 1), 12310 (15), 12494-95 (3, 3), 12938 (1); USNM 303680 (3), plus many additional lots from Santa Catarina. Type catalog: Ferraris 2007:255 [ref. 29155]. •Valid as Hypostomus isbrueckeri Reis, Weber & Malabarba 1990 -- (Burgess & Finley 1996:169 [ref. 22901], Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Weber in Reis et al. 2003:358 [ref. 27061], Armbruster 2004:79 [ref. 27644], Ferraris 2007:255 [ref. 29155], Zawadzki et al. 2012:246 [ref. 32031], Cardoso et al. 2012:77 [ref. 32154], Koerber & Litz 2014:4 [ref. 34967], Zawadzki et al. 2015:57 [ref. 33866], Cardoso et al. 2016:22 [ref. 34373], Bertaco et al. 2016:418 [ref. 34561], Koerber & Litz 2016:5 [ref. 35098], Nión et al. 2016:32 [ref. 35565], Zawadzki et al. 2018:[17] [ref. 35944], Zawadzki et al. 2019:[11] [ref. 37170], Koerber et al. 2020:6 [ref. 37480], Koerber et al. 2021:7 [ref. 38894], Terán et al. 2022:1 [ref. 39938], Koerber et al. 2023:7 [ref. 40355], Koerber et al. 2023:3 [ref. 40368], Loureiro et al. 2023:108 [ref. 40506]). Current status: Valid as Hypostomus isbrueckeri Reis, Weber & Malabarba 1990. Loricariidae: Hypostominae. Distribution: South America: Rio Uruguay basin (Brazil, Uruguay, Argentina). Habitat: freshwater.