La Trinidad desert pup
| La Trinidad desert pup | ||||||||||||
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| Systematics | ||||||||||||
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| Cyprinodon inmemoriam | ||||||||||||
| Lozano Vilano & Contreras-Balderas , 1993 |
The La Trinidad desert fish ( Cyprinodon inmemoriam ) (English: Charco Azul Pupfish; Spanish: Cachorrito de la Trinidad) is an extinct freshwater fish species from the genus of the desert fish ( Cyprinodon ). Only one male is known to have been caught on March 17, 1984 in the Ojo la Trinidad spring near Aramberri in the Mexican state of Nuevo León . The species epithet inmemoriam refers to the fact that the species was already extinct when it was described in 1993.
features
The only specimen has a total length of 7.5 cm. The fourth ceratobranchial has up to four teeth, at least one on each side. The length of the short upper jaw is included 0.68 times the length of the base of the anal fin . The postdorsal (distance from the dorsal fin to the caudal stalk) and postanal (distance from the anal fin to the caudal stalk) length is 0.8 times the length of the caudal stalk. The head and body are gray-blue. There are no stripes. The eye diameter is 1.2 times the length of the base of the anal fin. The head length is 3 times the standard length. The length of the short base of the anal fin is 3.3 times the length of the head. The short dorsal fin reaches the front third of the tail fin stalk.
habitat
The Ojo la Trinidad spring originally covered an area of 10,000 m². At the time the La Trinidad desert pup was discovered, it was only 1 to 2 m deep and was fed by rain. There was no vegetation and the bottom was muddy. It has dried up since 1985. The water was colorless and the water temperature was 19 ° C.
die out
The habitat of the La Trinidad desert pup is completely destroyed today. Searches for the species since 1984 were unsuccessful.
literature
- Maria de Lourdes Lozano Vilano; Salvador Contreras-Balderas: Four new species of Cyprinodon from southern Nuevo León, Mexico, with a key to the C. eximius complex (Teleostei: Cyprinodontidae). In: Ichthyological Exploration of Freshwaters v. 4 (no. 4), 1993: p. 295-308.
- Robert Rush Miller; Wendell L. Minckley & Steven Mark Norris (2006): Freshwater Fishes of Mexico . University of Chicago Press. ISBN 0226526046 : p. 303-304
- Lothar Seeghers: Killifishes of the world - New world killis . Aquaristik - Consulting & Service GmbH, 1997