armatus, Hisonotus Carvalho [T. P.], Lehmann A. [P.], Pereira [E. H. L.] & Reis [R. E.] 2008:510, Figs. 1-3 [Copeia 2008 (no. 3); ref. 29799] Pedro Osório, Arroio Arambaré, about 5 kilometers south of Vila Basílio, on road to Pedro Osório, 31°54'34"S, 53°01'39"W, Rio Grande do Sul, Brazil. Holotype: MCP 41323. Paratypes: ANSP 187116 (5); MCP 25138 (12, 3c&s), 34776 (31), 37682 (17, 4 c&s); MZUSP 93884 (5). Plus non-type material. •Valid as Hisonotus armatus Carvalho, Lehmann A., Pereira & Reis 2008 -- (Garvalho & Reis 2011:23 [ref. 31240], Koerber & Litz 2014:4 [ref. 34967], Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:379 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Koerber & Litz 2016:5 [ref. 35098], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235], Koerber et al. 2020:6 [ref. 37480], Koerber et al. 2021:7 [ref. 38894], Giora & Wingert 2023:45 [ref. 41026], Koerber et al. 2023:7 [ref. 40355], Loureiro et al. 2023:118 [ref. 40506]). Current status: Valid as Hisonotus armatus Carvalho, Lehmann A., Pereira & Reis 2008. Loricariidae: Hypoptopomatinae. Distribution: South America: Laguna dos Patos system (Brazil and Uruguay). Habitat: freshwater.