cujus, Chasmistes Cope [E. D.] 1883:149 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 35; ref. 951] Pyramid Lake, Washoe County, Nevada, U.S.A. Holotype (unique): ANSP 20523. Type catalog: Böhlke 1984:35 [ref. 13621], Gilbert 1998:179 [ref. 23395]. •Valid as Chasmistes cujus Cope 1883 -- (Lee et al. 1980:394 [ref. 22416], Page & Burr 1991:168 [ref. 18983], La Rivers 1994:363 [ref. 23389], Gilbert 1998:179 [ref. 23395], Nelson et al. 2004:79 [ref. 27807], Scharpf 2006:8 [ref. 30386], Page & Burr 2011:306 [ref. 31215], Page et al. 2013:79 [ref. 32708], Page et al. 2023:64 [ref. 40505]). Current status: Valid as Chasmistes cujus Cope 1883. Catostomidae: Catostominae. Distribution: North America: Nevada (U.S.A.). Habitat: freshwater.