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Phylogenetic relationships and evolutionary history of the Mesoamerican endemic freshwater fish family Profundulidae (Cyprinodontiformes: Actinopterygii)

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Morcillo Alonso, Felipe and Ornelas-García, Claudia Patricia and Alcaraz, Lourdes and Matamoros, Wilfredo A. and Doadrio Villarejo, Ignacio (2016) Phylogenetic relationships and evolutionary history of the Mesoamerican endemic freshwater fish family Profundulidae (Cyprinodontiformes: Actinopterygii). Molecular Phylogenetics and Evolution, 94 (A). pp. 242-251. ISSN 1055-7903, ESSN: 1095-9513

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Official URL: https://www.sciencedirect.com/science/article/pii/S1055790315002602



Abstract

Freshwater fishes of Profundulidae, which until now was composed of two subgenera, represent one of the few extant fish families endemic to Mesoamerica. In this study we investigated the phylogenetic relationships and evolutionary history of the eight recognized extant species (from 37 populations) of Profundulidae using three mitochondrial and one nuclear gene markers ( 2.9 Kbp). We applied a Bayesian species delimitation method as a first approach to resolving speciation patterns within Profundulidae considering two different scenarios, eight-species and twelve-species models, obtained in a previous phylogenetic analysis. Based on our results, each of the two subgenera was resolved as monophyletic, with a remarkable molecular divergence of 24.5% for mtDNA and 7.8% for nDNA uncorrected p distances, and thus we propose that they correspond to separate genera. Moreover, we propose a conservative taxonomic hypothesis with five species within Profundulus and three within Tlaloc, although both eight-species and twelve-species models were highly supported by the bayesian species delimitation analysis, providing additional evidence of higher taxonomic diversity than currently recognized in this family. According to our divergence time estimates, the family originated during the Upper Oligocene 26 Mya, and Profundulus and Tlaloc diverged in the Upper Oligocene or Lower Miocene about 20 Mya.


Item Type:Article
Uncontrolled Keywords:Profundulus; Tlaloc; Killifish; Phylogeny; Molecular clock; Mexico
Subjects:Medical sciences > Biology > Fishes
ID Code:46638
Deposited On:28 Feb 2018 12:25
Last Modified:28 Feb 2018 12:29

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