Teleostei (teleosts) >
Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Cyprinodontidae (Pupfishes) > Cyprinodontinae
Etymology: Cyprinodon: Latin, cyprinus = carp + Greek, odous = teeth (Ref. 45335).
More on author: Girard.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; non-migratory (Ref. 126106). Temperate; 15°C - 25°C (Ref. 12468); 30°N - 28°N
North America: Rio Grande drainage in Texas in the USA, from Devils River to mouth of Rio Conchos. Also in Rio Conchos system and endorheic Rio Sauz basin in Mexico.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 5.0 cm TL male/unsexed; (Ref. 5723)
Adults occur in sloughs, backwaters, and margins of small to medium rivers (avoiding hot springs). 5 cm max TL (Ref. 5723). Not a seasonal killifish. Is difficult to maintain in aquarium (Ref. 27139).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
Fisheries: commercial; aquarium: commercial
Tools
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01380 (0.00610 - 0.03124), b=3.14 (2.95 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trophic level (Ref. 69278) |
2.7 ±0.2 se; based on size and trophs of closest relatives |
Fishing Vulnerability (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |
Price category (Ref. 80766) |
Unknown.
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