formoso, Ancistrus Sabino [J.] & Trajano [E.] 1997:74, Figs. 3-4 [Revue française d'Aquariologie Herpétologie v. 24 (no. 3/4); ref. 23465] Buraco do Ducho cave, Serra da Bodoquena, Município de Bonito, 21°08'S, 56°28'W, Mato Grosso do Sul, Brazil. Holotype (unique): MZUSP 51836. Type catalog: Ferraris 2007:221 [ref. 29155]. •Valid as Ancistrus formoso Sabino & Trajano 1997 -- (Isbrücker 2001:25 [ref. 25653], Romero & Paulson 2001:29 [ref. 26040], Isbrücker 2002:12 [ref. 27178], Fisch-Muller in Reis et al. 2003:375 [ref. 27061], Proudlove 2006:154 [ref. 28992], Ferraris 2007:221 [ref. 29155], Bifi et al. 2009:41 [ref. 30541]). Current status: Valid as Ancistrus formoso Sabino & Trajano 1997. Loricariidae: Hypostominae. Distribution: Cave in Formoso phreatic system, Rio Formoso basin, Mato Grosso do Sul, Brazil. Habitat: freshwater.