chamaizelus, Bunocephalus Eigenmann [C. H.] 1912:127, Fig 24; Pl. 2 (fig. 1) [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Erukin, Guyana. Holotype: FMNH 53122 [ex CM 1556]. Paratypes: (18, CM and IU) BMNH 1911.10.31.123 (1); CAS 35243 [ex IU 11976] (2), 35244 [ex IU 11975] (2), 35245 [ex IU 11974] (2); FMNH 7370 (1), 53123-25 (2, 2, 2); MCZ 30088 (1); CAS-SU 21778 (1); USNM 66122 [ex CM] (1). Type catalog: Henn 1928:79 [ref. 12305], Böhlke 1953:45 [ref. 12291], Ibarra & Stewart 1987:19 [ref. 12367], Ferraris & Vari 1992:9 [ref. 19771], Ferraris 2007:59 [ref. 29155]. •Valid as Dysichthys chamaizelus (Eigenmann 1912) -- (Mees 1988:90 [ref. 6401], Mees 1989:236 [ref. 13383], Burgess & Finley 1996:167 [ref. 22901]). •Valid as Bunocephalus chamaizelus Eigenmann 1912 -- (Burgess 1989:303 [ref. 12860], Friel in Reis et al. 2003:262 [ref. 27061], Ferraris 2007:59 [ref. 29155], Cardoso 2010:612 [ref. 30972], Carvalho et al. 2015:509 [ref. 33972] as chaimazelus in one place, see DoNascimiento et al. 2017:[21] [ref. 35679]). Current status: Valid as Bunocephalus chamaizelus Eigenmann 1912. Aspredinidae: Aspredininae. Distribution: Essequibo River basin, Guyana. Habitat: freshwater.