iota, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2009:4, Figs. 2, 3A, 4, 5A, 6A, 7 [Zootaxa No. 2113; ref. 30193] Coronel de Freitas, rio Chapecó at vila São Miguel on road from Coronel de Freitas to Quilombo, rio Uruguay basin, 26°51'26"S, 52°44'29"W, Santa Catarina State, Brazil. Holotype: MCP 42575. Paratypes: ANSP 187472 (4), MCP 40029 (18 + 3 c&s). •Valid as Hisonotus iota Carvalho & Reis 2009 -- (Garvalho & Reis 2011:27 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus iota Carvalho & Reis 2009. Loricariidae: Hypoptopomatinae. Distribution: Rio Chapecó, a tributary of the upper rio Uruguay basin: Brazil. Habitat: freshwater.