occidentalis, Catostomus Ayres [W. O.] 1854:10 [The Pacific [newspaper] v. 3 and 4 (thru no. 6); ref. 157] Sacramento and San Joaquin rivers, California, U.S.A. Syntypes: USNM 241 (1). Type catalog: Gilbert 1998:194 [ref. 23395]. Appeared first in Ayres 1854:1, col. 1 [ref. 6368] but regarded as without distinguishing features. Available as above. Also in Ayres 1854:18 [ref. 18923]. •Valid as Catostomus occidentalis Ayres 1854 [sometimes as subspecies occidentalis] -- (Lee et al. 1980:385 [ref. 22416], Ward & Fritzsche 1987:175 [ref. 20806], Page & Burr 1991:172 [ref. 18983], Gilbert 1998:194 [ref. 23395], Fuller et al. 1999:160 [ref. 25838], Moyle 2002:185 [ref. 26449], Nelson et al. 2004:78 [ref. 27807], Scharpf 2006:7 [ref. 30386] with subspecies, Kettratad & Markle 2010:276 [ref. 30991], Page & Burr 2011:313 [ref. 31215], Page et al. 2013:79 [ref. 32708], Page et al. 2023:64 [ref. 40505]). Current status: Valid as Catostomus occidentalis Ayres 1854. Catostomidae: Catostominae. Distribution: Western North America: California and southern Oregon (western U.S.A.). Habitat: freshwater.