| Cyprinodontidae (Pupfishes), subfamily: Cyprinodontinae |
| 5.14 cm SL (male/unsexed) |
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benthopelagic; freshwater, non-migratory |
| Central America: Mexico. |
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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). |
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Extinct in the Wild (EW); Date assessed: 27 September 2018 Ref. (130435)
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| harmless |
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Known from the Río San Juan system (Ref. 81264). Type locality, interior basin of Llanos de Salas, Aramberri, Nuevo Leon, Charco de Palma, UANL 8281(holotype of Cyprinodon longidorsalis, 4.06 cm SL, mature male) (Ref. 26729). Considered as endangered (Lozano and Contreras, 1989) and species of special concern (Williams et al., 1989) (Ref. 26729). Also Ref. 12255, 27139.
Status of threat: extirpated in nature. Criteria: 1,5 (http://fisc.er.usgs.gov/afs/) (Ref. 81264). |
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