gymnorhynchus, Ancistrus Kner [R.] 1854:275 [25] [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Classe. v. 7; ref. 2628] Puerto Cabello, Venezuela. Holotype (unique): NMW 43495. Type catalog: Ferraris 2007:221 [ref. 29155]. On p. 25 of separate. •Valid as Ancistrus gymnorhynchus Kner 1854 -- (Isbrücker 1980:69 [ref. 2303], Burgess 1989:437 [ref. 12860], Isbrücker 2001:25 [ref. 25653], Isbrücker 2002:12 [ref. 27178], Fisch-Muller in Reis et al. 2003:376 [ref. 27061], Menni 2004:81 [ref. 28131], Ferraris 2007:221 [ref. 29155], Taphorn et al. 2010:21 [ref. 30697], de Oliveira et al. 2015:81 [ref. 33869], see DoNascimiento et al. 2017:[20] [ref. 35679], de Souza et al. 2019:58 [ref. 36504]). Current status: Valid as Ancistrus gymnorhynchus Kner 1854. Loricariidae: Hypostominae. Distribution: Venezuela: Coastal rivers of Falcón, Lara, Carabobo and Yaracuy states and upper Pao River drainage in the Orinoco River basin Venezuela. Habitat: freshwater.