petroleus, Hoplomyzon atrizona Schultz [L. P.] 1944:248, Pl. 4 (fig. C); Fig. 4a [Proceedings of the United States National Museum v. 94 (no. 3172); ref. 3959] Río Motatán, 4 kilometers above Motatán, Maracaibo basin, Venezuela. Holotype: USNM 121070. Paratypes: USNM 121071 (1). Type catalog: Ferraris & Vari 1992:10 [ref. 19771], Ferraris 2007:61 [ref. 29155]. •Synonym of Hoplomyzon atrizona Myers 1942, but a valid subspecies as described -- (Mees 1988:90 [ref. 6401], Burgess 1989:304 [ref. 12860]). •Synonym of Hoplomyzon atrizona Myers 1942 -- (Friel in Reis et al. 2003:264 [ref. 27061], Ferraris 2007:61 [ref. 29155], Carvalho et al. 2017:[15] [ref. 35228]). Current status: Synonym of Hoplomyzon atrizona Myers 1942. Aspredinidae: Hoplomyzontinae. Habitat: freshwater.