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Re-examination and phylogeny of the genus Chondrostoma based on mitochondrial and nuclear data and the deWnition of 5 new genera
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Orientador(es)
Resumo(s)
Previous molecular phylogenetic studies of the genus Chondrostoma (Cyprinidae: Leuciscinae) were unable to resolve the relationship
among its major species groups. In this paper we present a phylogeny for this genus, based on Wve mitochondrial genes and the nuclear
gene -actin, comprising a total of 4068 bp. Bayesian inference using all gene fragments yielded a fully resolved phylogeny, compatible
with topologies obtained from individual fragments using maximum parsimony and minimum evolution. Mapping of morphological
characters critical to the rasping feeding mode of most Chondrostoma species indicates that they evolved several times, and questions the
use of these characters in the traditional deWnition of the genus. Our Wndings led us to the deWnition of the following new genera: Achondrostoma,
Iberochondrostoma, Pseudochondrostoma, Protochondrostoma and Parachondrostoma. Our data contradict the hypothesis of a
rapid radiation during Lago Mare phase, suggested by previous studies.
Descrição
Palavras-chave
Cyprinidae Paleobiogeography B-Actin Character mapping Taxonomic revision New genera
Contexto Educativo
Citação
Molecular Phylogenetics and Evolution, 42, 362-372
Editora
Elsevier