aky, Epactionotus Azpelicueta [M. de las M.], Casciotta [J. R.], Almirón [A. E.] & Koerber [S.] 2004:82, Figs. 1-6 [Verhandlungen der Gesellschaft für Ichthyologie v. 4 (2004); ref. 28029] Arroyo Garibaldi, 26°38'46.1"S, 53°59'55"W, Río Uruguay basin at Misiones, Argentina. Holotype: MLP 10459 [ex AI 124]. Paratypes: AI 125 (8), MHNG 2643.39 (2). Type catalog: Ferraris 2007:236 [ref. 29155], Nadalin & López 2015:6 [ref. 34112]. •Valid as Epactionotus aky Azpelicueta, Casciotta, Almirón & Koerber 2004 -- (Ferraris 2007:236 [ref. 29155]). •Valid as Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber 2004) -- (Carvalho & Reis 2009:26 [ref. 30193], Koerber 2011:5 [ref. 31122], Garvalho & Reis 2011:35 [ref. 31240], Koerber 2014:9 [ref. 33621], Roxo et al. 2015:137 [ref. 33763], Mirande & Koerber 2015:41 [ref. 35117], Zawadzki et al. 2016:379 [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:[11] [ref. 35900]). Current status: Valid as Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber 2004). Loricariidae: Hypoptopomatinae. Distribution: Uruguay River basin, Argentina. Habitat: freshwater.