signifer, Stypodon Garman [S.] 1881:90 [Bulletin of the Museum of Comparative Zoology v. 8 (no. 3); ref. 1530] Lago de Parras, Parras, Coahuila, Mexico. Syntypes: MCZ 24896 (2). Now extinct. •Valid as Stypodon signifer Garman 1881 -- (Espinosa Pérez et al. 1993:20 [ref. 22290], Gilbert 1998:147 [ref. 23395], Nelson et al. 2004:78 [ref. 27807], Scharpf 2005:42 [ref. 28940], Miller 2006:140 [ref. 28615], Page et al. 2013:78 [ref. 32708], Page et al. 2023:76 [ref. 40505]). Current status: Valid as Stypodon signifer Garman 1881. Leuciscidae: Pogonichthyinae. Distribution: Southern North America: Coahuila (Mexico) [extinct]. Habitat: freshwater.