aulidion, Notropis Chernoff [B.] & Miller [R. R.] 1986:177, Figs. 3, 5, 7, 8 [Copeia 1986 (no. 1); ref. 6782] Reservoir, about 25 kilometers east of city of Durango, state of Durango, Mexico. Holotype: UMMZ 212499. Paratypes: UMMZ 161687 (8, 2 c&s), 179646 (4). Type catalog: Gilbert 1998:46 [ref. 23395]. •Valid as Hybopsis aulidion (Chernoff & Miller 1986) -- (Miller 2006:127 [ref. 28615]). •Valid as Notropis aulidion Chernoff & Miller 1986 -- (Espinosa Pérez et al. 1993:17 [ref. 22290], Gilbert 1998:46 [ref. 23395], Nelson et al. 2004:74 [ref. 27807], Lyons & Mercado-Silva 2004:873 [ref. 28048], Scharpf 2005:27 [ref. 28940], Domínguez-Domínguez et al. 2009:161 [ref. 30768], Page et al. 2013:74 [ref. 32708]). •Valid as Aztecula aulidion (Chernoff & Miller 1986) -- (Stout et al. 2022:15 [ref. 39738], Page et al. 2023:67 [ref. 40505]). Current status: Valid as Aztecula aulidion (Chernoff & Miller 1986). Leuciscidae: Pogonichthyinae. Distribution: Southern North America: Pacific Slope of Mexico [apparently extinct]. Habitat: freshwater.