bidens, Gnathodolus Myers [G. S.] 1927:108 [Bulletin of the Museum of Comparative Zoology v. 68 (no. 3); ref. 3096] Chemoni, Río Cassiquiare, Venezuela. Holotype: CAS 20087 [ex IU 17670]. Paratypes: CAS 27651 [ex IU 17671] (1), MCZ 31566 (1, missing). •Valid as Gnathodolus bidens Myers 1927 -- (Santos & Jégu 1996:160 [ref. 23717], Garavello & Britski in Reis et al. 2003:72 [ref. 27061], Sidlauskas & Santos 2005:121 [ref. 28904], DoNascimiento et al. 2017:39 [ref. 35633]). Current status: Valid as Gnathodolus bidens Myers 1927. Anostomidae. Distribution: Orinoco and Casquiare rivers, Venezuela and Colombia. Habitat: freshwater.