gracilis, Epactionotus Reis [R. E.] & Schaefer [S. A.] 1998:12, Fig. 6 [American Museum Novitates No. 3254; ref. 23691] Rio Jordão at Jordão Alto, 28°36'S, 49°29'W, Nova Veneza, Santa Catarina State, Brazil. Holotype: MCP 20282. Paratypes: ANSP 168968 (20); MCP 11615 (19, 2 c&s), 19193 (2); USNM 285878 (10). Type catalog: Ferraris 2007:236 [ref. 29155]. •Valid as Epactionotus gracilis 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], Delapieve et al. 2020:20 [ref. 37840]). •Valid as Hisonotus gracilis (Reis & Schaefer 1998) -- (Roxo et al. 2019:160 [ref. 36538]). Current status: Valid as Epactionotus gracilis Reis & Schaefer 1998. Loricariidae: Hypoptopomatinae. Distribution: Araranguá River basin, Santa Catarina, southern Brazil. Habitat: freshwater.