Cyprinodon esconditus, a new pupfish from Laguna Chichancanab, Yucatan, Mexico (Cyprinodontidae)

Strecker U.

Date de parution: décembre 2002
Volume: 26
Number: 4
Pagination: 301-307
doi: https://doi.org/10.26028/cybium/2002-264-005
Résumé

Cyprinodon esconditus, new species, belongs to the Cyprinodon species flock from Laguna Chichancanab, Yucatán, Mexico. The flock now consists of six species, which are hypothesized to have evolved sympatrically in the lake during the last 8,000 years. Cyprinodon esconditus is similar in meristic counts and overall shape and coloration to the other members of the flock. It differs in having a smaller eye, and shorter predorsal and prepelvic lengths. Also, the number of premaxillary teeth differs from that in the other members of the species flock: they are more numerous than in C. beltrani, C. maya, C. verecundus and C. labiosus but fewer than in C. simus.

Mots-clés: Cyprinodon esconditus - Cyprinodontidae - Laguna Chinchancanab - Mexico - New species - Species flock - Sympatric speciation
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