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 / Climate / Range
Freshwater; demersal; potamodromous (Ref. 94077). Temperate, preferred ?; 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. 109396)
CITES (Ref. 94142)
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), 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).
Prior r = 0.34, 2 SD range = 0.15 - 0.78, log(r) = -1.08, SD log(r) = 0.41, Based on: 2 tgen, 1 tmax, 3 Fec records
Vulnerability (Ref. 59153
): High vulnerability (60 of 100) .