Late Miocene diversification and phylogenetic relationships of the huge toads in the Rhinella marina (Linnaeus, 1758) species group (Anura: Bufonidae)
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2010-09-08
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Resumo
We investigated the phylogeny and biogeography of the Rhinella marina group, using molecular, morphological,
and skin-secretion data, contributing to an understanding of Neotropical faunal diversification.
The maximum-parsimony and Bayesian analyzes of the combined data recovered a monophyletic R. marina
group. Molecular dating based on Bayesian inferences and fossil calibration placed the earliest phylogenetic
split within the R. marina group at 10.47 MYA, in the late Miocene. Two rapid major
diversifications occurred from Central Brazil, first northward ( 8.08 MYA) in late Miocene and later
southward ( 5.17 MYA) in early Pliocene. These results suggest that barriers and dispersal routes created
by the uplift of Brazilian Central Shield and climatic changes explain the diversification and current species
distributions of the R. marina group. Dispersal-vicariance analyzes (DIVA) indicated that the two
major diversifications of the R. marina group were due to vicariance, although eleven dispersals subsequently
occurred.
Descrição
v. 57, p. 787-797, 2010.
Palavras-chave
Biogeography, DIVA, Phylogeny, Relaxed Bayesian molecular clock, Rhinella marina group
Citação
MACIEL, N. M.; COLLEVATTI, R.G.; COLLI, G.R.; SCHWARTZ, E. F. Late Miocene diversification and phylogenetic relationships of the huge toads in the Rhinella marina (Linnaeus, 1758) species group (Anura: Bufonidae). Molecular Phylogenetics and Evolution, v. 57, p. 787-797, 2010.