depressus, Bunocephalus Haseman [J. D.] 1911:319, Pls. 48 (fig. 1), 49 [Annals of the Carnegie Museum v. 7 (nos 3-4) (17); ref. 2047] Río Machupo near San Joaquín, Amazon system, Bolivia. Holotype (unique): FMNH 54338 [ex CM 2984]. Type catalog: Henn 1928:79 [ref. 12305], Ibarra & Stewart 1987:19 [ref. 12367], Ferraris 2007:62 [ref. 29155]. •Valid as Bunocephalus depressus Haseman 1911 -- (Burgess 1989:303 [ref. 12860]). •Valid as Dysichthys depressus (Haseman 1911) -- (Mees 1988:90 [ref. 6401], Mees 1989:233 [ref. 13383], Burgess & Finley 1996:167 [ref. 22901]). •Valid as Pterobunocephalus depressus (Haseman 1911) -- (Friel in Reis et al. 2003:264 [ref. 27061], Ferraris 2007:62 [ref. 29155], Koerber 2011:4 [ref. 31122], Barriga Salazar 2014:110 [ref. 35745], Koerber 2014:7 [ref. 33621], Sarmiento et al. 2014:189 [ref. 35004], Mirande & Koerber 2015:35 [ref. 35117], Koerber et al. 2017:54 [ref. 35267], DoNascimiento et al. 2017:85 [ref. 35633], Meza-Vargas et al. 2021:24 [ref. 39298]). Current status: Valid as Pterobunocephalus depressus (Haseman 1911). Aspredinidae: Aspredininae. Distribution: South America: Amazon, Orinoco, Paraná and Paraguay River basins (Argentina, Bolivia, Brazil, Colombia, Ecuador, Paraguay and Venezuela). Habitat: freshwater.