heterogaster, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:40, Figs. 4h, 8h, 42-43 [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Júlio de Castilhos, arroio Felicio, on road from Nova Palma to Júlio de Castilhos, 29°19'04"S, 53°37'54"W, Rio Grande do Sul, Brazil. Holotype: MCP 44514. Paratypes: ANSP 188706 (3); MCP 26802 (1)41073 (7, 2 c&s); MZUSP 14948 (3). •Valid as Hisonotus heterogaster Carvalho & Reis 2011 -- (Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus heterogaster Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Rio Jacuí basin, Brazil. Habitat: freshwater.