nigrirostrum, Sturiosoma Fowler [H. W.] 1940:249, Figs. 48-50 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 91 (for 1939); ref. 1432] Contamana, Río Ucayali, Peru. Holotype: ANSP 68666. Paratypes: ANSP 68667-68 (2). Type catalog: Böhlke 1984:123 [ref. 13621], Ferraris 2007:299 [ref. 29155]. Original genus should have been Sturisoma. •Valid as Sturisoma nigrirostrum Fowler 1940 -- (Ovchynnyk 1967:38 [ref. 37559], Isbrücker 1980:95 [ref. 2303], Ortega & Vari 1986:18 [ref. 9708], Burgess 1989:440 [ref. 12860], Isbrücker 2001:32 [ref. 25653], Isbrücker 2002:29 [ref. 27178], Ferraris in Reis et al. 2003:346 [ref. 27061], Ferraris 2007:299 [ref. 29155], Barriga Salazar 2014:112 [ref. 35745], Sarmiento et al. 2014:192 [ref. 35004], Londoño-Burbano 2018:[13] [ref. 35813], Careaga et al. 2020:78 [ref. 37774], Meza-Vargas et al. 2021:27 [ref. 39298], Londoño-Burbano & Britto 2022:13 [ref. 39789], Londoño-Burbano & Britto 2023:26 [ref. 40709]). Current status: Valid as Sturisoma nigrirostrum Fowler 1940. Loricariidae: Loricariinae. Distribution: South America: Ucayali and Yavari River drainages, western Amazon basin, Peru and Brazil. Habitat: freshwater.