Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cyprinodontiformes
(Rivulines, killifishes and live bearers) > Cyprinodontidae
(Pupfishes) > Cyprinodontinae
Etymology: Cyprinodon: Latin, cyprinus = carp + Greek, odous = teeth (Ref. 45335); longidorsalis: Name frm Latin 'longus' meaning long and 'dorsalis' for dorsum, referring to the long dorsal fin; noun in apposition.
Environment / Climate / Range
Freshwater; benthopelagic; non-migratory. Tropical, preferred ?
Central America: Mexico.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 5.1 cm SL male/unsexed; (Ref. 26729)
This species is unique in having the following characters: a long depressed dorsal reaching posteriorly from 3/4 of the length of caudal peduncle to caudal base; dorsal origin in front of pelvic fin; 0-2 teeth on fourth ceratobranchial; lips as thick or thicker than pupil diameter, lower one wide with a marked fold in the cleft; males golden blue from head to body, with 7-8 bars, the first 3-4 only on dorsum, the others to venter; females with central regular ocellus of dorsal fin larger than pupil (Ref. 26729).
Area of collection, Charco La Palma, during spring has water temperature of 21°C, clear with muddy bottom easily roiled; algae predominant, with some submerged terrestrials, and formerly with swampy outlet that extended 2-3 m 'downstream' SE, is now dry (Ref. 26729). Not a seasonal killifish and difficult to maintain in aquarium (Ref. 27139).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Lozano-Vilano, M. de L. and S. Conteras-Balderas, 1993. Four new species of Cyprinodon from southern Nuevo León, Mexico, with a key to the C. eximius complex (Teleostei: Cyprinodontidae). Ichthyol. Explor. Freshwat. 4(4):295-308. (Ref. 26729)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00448 - 0.02337), b=3.21 (3.02 - 3.40), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.9 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (13 of 100) .