Back Deltistes luxatus Catalan Deltistes luxatus CEB Deltistes luxatus German Deltistes luxatus Spanish Deltistes luxatus Basque Deltistes luxatus Dutch Deltistes luxatus Portuguese Deltistes luxatus Serbian Deltistes luxatus Swedish Deltistes luxatus Vietnamese
| Lost River sucker | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Catostomidae |
| Genus: | Deltistes |
| Species: | D. luxatus
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| Binomial name | |
| Deltistes luxatus (Cope, 1879)
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| Synonyms[4] | |
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The Lost River sucker (Deltistes luxatus), known as the c'waam (pronounced /tʃwɑːm/ CHWAHM) by the Klamath Tribes,[5][6] 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.[2][7]
- ^ NatureServe (2013). "Deltistes luxatus". IUCN Red List of Threatened Species. 2013: e.T6338A15362648. doi:10.2305/IUCN.UK.2013-1.RLTS.T6338A15362648.en. Retrieved 19 January 2024.
- ^ a b "Lost River sucker (Deltistes luxatus)". Environmental Conservation Online System. Environmental Conservation Online System. Retrieved 19 January 2024.
- ^ 53 FR 27130
- ^ "Deltistes luxatus (Cope, 1879)". Integrated Taxonomic Information System. Retrieved 19 January 2024.
- ^ Neumann, Erik; Jefferson Public Radio (3 July 2021). "C'waam and Koptu: The fish at the center of the Klamath Basin's water crisis". OPB. Retrieved 19 January 2024.
- ^ "Ambodat Facility Produces Another Generation of Endangered c'waam and koptu" (Press release). Klamath Tribes. 11 May 2023. Retrieved 3 September 2024.
- ^ Cite error: The named reference
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