cuchillo, Apteronotus Schultz [L. P.] 1949:69, Pl. 3 (fig. A) [Proceedings of the United States National Museum v. 99 (no. 3235); ref. 3967] Río Socuy, 3 kilometers above mouth, Maracaibo basin, Venezuela. Holotype: USNM 121591. Paratypes: G. Dahl coll. [ex USNM 12159] (2); MBUCV-V-7554 [ex USNM 121590] (1); MCZ 37218 [ex USNM 121589] (1), 52010 [ex USNM 121589 and MCZ 37218] (1, c&s); UMMZ 157673 (3); USNM 121587-89 (13, now 0, now 7), 121590 (7, now 6, 1 c&s). Type catalog: Ferraris & Vari 1992:4 [ref. 19771], Provenzano et al. 1998:4 [ref. 24196], Ferraris et al. 2017:[7] [ref. 35236]. •Valid as Apteronotus cuchillo Schultz 1949 -- (Mago-Leccia 1994:30 [ref. 21320], Galvis et al. 1997:103 [ref. 23651], de Santana 2003:6 [ref. 26978], Albert in Reis et al. 2003:498 [ref. 27061], de Santana & Maldonado-Ocampo 2005:229 [ref. 28331], de Santana & Crampton 2006:115 [ref. 28765], Triques 2011:300 [ref. 31671], de Santana & Cox Fernandes 2012:284 [ref. 32053], Ferraris et al. 2017:[7] [ref. 35236], DoNascimiento et al. 2017:67 [ref. 35633]). Current status: Valid as Apteronotus cuchillo Schultz 1949. Apteronotidae: Apteronotinae. Distribution: Lake Maracaibo basin: Colombia and Venezuela. Habitat: freshwater.