Evolutionary history of the genus Trisopterus |
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Authors: | Gonzalez Elena G Cunha Regina L Sevilla Rafael G Ghanavi Hamid R Krey Grigorios Bautista José M |
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Institution: | a Departmento de Bioquímica y Biología Molecular IV, Universidad Complutense de Madrid (UCM), Facultad de Veterinaria, Av. Puerta de Hierro s/n, 28040 Madrid, Spain b CCMAR, Campus de Gambelas, Universidade do Algarve, 8005-139 Faro, Portugal c National Agricultural Research Foundation, Fisheries Research Institute, Nea Peramos, Kavala, GR 64007, Greece |
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Abstract: | The group of small poor cods and pouts from the genus Trisopterus, belonging to the Gadidae family, comprises four described benthopelagic species that occur across the North-eastern Atlantic, from the Baltic Sea to the coast of Morocco, and the Mediterranean. Here, we combined molecular data from mitochondrial (cytochrome b) and nuclear (rhodopsin) genes to confirm the taxonomic status of the described species and to disentangle the evolutionary history of the genus. Our analyses supported the monophyly of the genus Trisopterus and confirmed the recently described species Trisopterus capelanus. A relaxed molecular clock analysis estimated an Oligocene origin for the group (∼30 million years ago; mya) indicating this genus as one of the most ancestral within the Gadidae family. The closure and re-opening of the Strait of Gibraltar after the Messinian Salinity Crisis (MSC) probably triggered the speciation process that resulted in the recently described T. capelanus. |
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Keywords: | Gadidae Trisopterus Cytochrome b Rhodopsin Historical demography Messinian Salinity Crisis |
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