Cyprinodon pachycephalus Minckley & Minckley, 1986
Bighead pupfish
Bighead pupfish,  Cachorrito cabezón,  Cachorrito cabezon

Family:  Cyprinodontidae (Pupfishes), subfamily: Cyprinodontinae
Max. size:  5 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater, non-migratory
Distribution:  Central America: Río Conchos, Mexico.
Diagnosis:   
Biology:  Not a seasonal killifish. Is very difficult to maintain in aquarium (Ref. 27139).
IUCN Red List Status: Critically Endangered (CR); Date assessed: 28 September 2018 (B1ab(i,iii)) Ref. (130435)
Threat to humans:  harmless
Country info:  Found in Chihuahua (Ref. 27139). Known from the Río Conchos system (Ref. 81264). Also Ref. 3881, 6376. Status of threat: endangered; status same as 1989. Criteria: 1,5 (http://fisc.er.usgs.gov/afs/) (Ref. 81264).


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