nationi, Lasiancistrus Fernández-Yépez [A.] 1972:23, Pl. 23 [Análisis ictiológico del complejo hidrográfico; ref. 19696] Río Yaracuy drainage, Venezuela. Holotype: AFY (lost). Paratypes: (9). Type catalog: Ferraris 2007:223 [ref. 29155]. •Valid as Lasiancistrus nationi Fernández-Yépez 1972 -- (Isbrücker 1980:45 [ref. 2303], Burgess 1989:434 [ref. 12860], Knaack 2000:58 [ref. 27233], Isbrücker 2001:29 [ref. 25653], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:388 [ref. 27061]). •Valid as Ancistrus nationi (Fernández-Yépez 1972) -- (Ferraris 2007:223 [ref. 29155]). •Synonym of Ancistrus gymnorhynchus Kner 1854 -- (Taphorn et al. 2010:21 [ref. 30697], DoNascimiento 2016:540 [ref. 34727]). Current status: Synonym of Ancistrus gymnorhynchus Kner 1854. Loricariidae: Hypostominae. Distribution: Venezuela [if valid]. Habitat: freshwater.