Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Catostomidae
(Suckers) > Catostominae
Etymology: Chasmistes: Greek, chanos, -eos, ous, and chasma, -atos = abyss, mouth opened, inmensity (Ref. 45335). More on author: Cope.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; potamodromous (Ref. 94077). Temperate; 43°N - 42°N
North America: endemic to the upper Klamath River Basin, including the Lost River in Oregon and Lower Klamath Lake sub-basins and Clear Lake Reservoir in California, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 64.0 cm TL male/unsexed; (Ref. 5723); common length : 40.0 cm TL male/unsexed; (Ref. 12193); max. reported age: 33 years (Ref. 94077)
Usually found near vegetation around lake margin. Spawning occurs in lake tributaries.
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
IUCN Red List Status (Ref. 120744)
Endangered (EN) (A2bc; B1ab(iii,v)+2ab(iii,v)); Date assessed: 02 November 2011
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Tmax=33; tm=4-6; Fec=18,000-72,500).
Vulnerability (Ref. 59153
): High vulnerability (60 of 100) .