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Evolutionary scenarios for the origin of an Antarctic tardigrade species based on molecular clock analyses and biogeographic data Naturalis
Guidetti, R.; McInnes, S.J.; Cesari, M.; Rebecchi, L.; Rota-Stabelli, O..
The origin of the Antarctic continental extant fauna is a highly debated topic, complicated by the paucity of organisms for which we have clear biogeographic distributions and understanding of their evolutionary timescale. To shed new light on this topic, we coupled molecular clock analyses with biogeographic studies on the heterotardigrade Mopsechiniscus genus. This taxon includes species with endemic distributions in Antarctica and other regions of the southern hemisphere. Molecular dating using different models and calibration priors retrieved similar divergence time for the split between the Antarctic and South American Mopsechiniscus lineages (32–48 Mya) and the estimated age of the Drake Passage opening that led to the separation of Antarctica and...
Tipo: Article / Letter to the editor Palavras-chave: Gondwana historical biogeography Last Glacial Maximum molecular clock dating; Vicariance.
Ano: 2017 URL: http://www.repository.naturalis.nl/record/630170
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