psilogaster, Hypoptopoma Fowler [H. W.] 1915:235, Fig. 9 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 67; ref. 1392] Peruvian Amazon. Holotype (unique): ANSP 21922. Type catalog: Böhlke 1984:124 [ref. 13621], Ferraris 2007:250 [ref. 29155]. •Valid as Hypoptopoma psilogaster Fowler 1915 -- (Isbrücker 1980:88 [ref. 2303], Ortega & Vari 1986:17 [ref. 9708], Burgess 1989:439 [ref. 12860], Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Schaefer in Reis et al. 2003:323 [ref. 27061], Ferraris 2007:250 [ref. 29155], Aquino & Schaefer 2010:32 [ref. 30875], Barriga Salazar 2014:112 [ref. 35745], see DoNascimiento et al. 2017:[17] [ref. 35679], Delapieve et al. 2018:22 [ref. 35713], Meza-Vargas et al. 2021:25 [ref. 39298]). Current status: Valid as Hypoptopoma psilogaster Fowler 1915. Loricariidae: Hypoptopomatinae. Distribution: South America: Amazon River basin (Peru and Ecuador). Habitat: freshwater.