Lost River sucker

Lost River sucker
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Catostomidae
Genus: Deltistes
Species:
D. luxatus
Binomial name
Deltistes luxatus
(Cope, 1879)
Synonyms
  • Catostomus luxatus (Cope, 1879)
  • Chasmistes luxatus Cope, 1879
  • Catostomus rex Eigenmann, 1891

The Lost River sucker (Deltistes luxatus), known as the c'waam (pronounced /wɑːm/ CHWAHM) by the Klamath Tribes, is a species of ray-finned fish in the family Catostomidae. It is the only living member of the genus Deltistes. It is found only in California and Oregon. Its population is much reduced from historical numbers for a number of reasons. It is federally listed as an endangered species of the United States.