maculipinnis, Otocinclus Regan [C. T.] 1912:668, Pl. 77 (fig. 3) [Proceedings of the Zoological Society of London 1912 (pt 3) (art. 36); ref. 14862] Rio de la Plata, South America. Syntypes: BMNH 1909.4.2.19-22 (4). Type catalog: Ferraris 2007:248 [ref. 29155]. •Valid as Otocinclus maculipinnis Regan 1912 -- (Isbrücker 1980:84 [ref. 2303], Burgess 1989:438 [ref. 12860], Schaefer 1991:6 [ref. 18926]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Microlepidogaster maculipinnis (Regan 1912) -- (López et al. 2003:44 [ref. 27366], Menni 2004:79 [ref. 28131]). •Valid as Hisonotus maculipinnis (Regan 1912) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Schaefer in Reis et al. 2003:323 [ref. 27061], Almirón & Azpelicueta 2006:87 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Azpelicueta & Almirón 2007:596 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Garvalho & Reis 2011:9 [ref. 31240], Litz & Koerber 2014:24 [ref. 33622], Mirande & Koerber 2015:41 [ref. 35117], Nión et al. 2016:31 [ref. 35565], Calegari et al. 2017:244 [ref. 35203], Koerber et al. 2017:58 [ref. 35267]). Current status: Valid as Hisonotus maculipinnis (Regan 1912). Loricariidae: Hypoptopomatinae. Distribution: Lower Paraná basin, Paraguay and La Plata River basins: Argentina, Paraguay and Uruguay. Habitat: freshwater.