bilineatus, Epactionotus Reis [R. E.] & Schaefer [S. A.] 1998:5, Fig. 3 [American Museum Novitates No. 3254; ref. 23691] Mouth of arroio do Ouro, which flows into rio Maquiné, between Barra do Ouro and Maquiné, 29°35'S, 50°17'W, Rio Grande do Sul State, Brazil. Holotype: MCP 20279. Paratypes: ANSP 168961 (4), 168970 (4); MCN 11099 (4), 11104 (4); MCP 13610 (2), 14151 (1), 14806 (5, 1 c&s), 20280 (19, 2 c&s); MZUSP 52460 (4). Type catalog: Ferraris 2007:236 [ref. 29155]. •Valid as Epactionotus bilineatus Reis & Schaefer 1998 -- (Isbrücker 2001:27 [ref. 25653], Isbrücker 2002:15 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Azpelicueta et al. 2004:89 [ref. 28029], Almirón et al. 2004:143 [ref. 27988], Ferraris 2007:236 [ref. 29155], Chiachio et al. 2008:610 [ref. 30127], Bertaco et al. 2016:417 [ref. 34561], Delapieve et al. 2020:19 [ref. 37840]). •Valid as Hisonotus bilineatus (Reis & Schaefer 1998) -- (Roxo et al. 2019:160 [ref. 36538]). Current status: Valid as Epactionotus bilineatus Reis & Schaefer 1998. Loricariidae: Hypoptopomatinae. Distribution: Maquiné and Três Forquilhas River drainages, Tramandaí River basin, Rio Grande do Sul, southern Brazil. Habitat: freshwater.