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1 December 2011 Evolutionary diversification of Phyllomys (Rodentia: Echimyidae) in the Brazilian Atlantic Forest
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Abstract

Tree rats of the genus Phyllomys are arboreal rodents endemic to the Brazilian Atlantic Forest. Previous phylogenetic analysis of mitochondrial DNA resulted in a basal polytomy of species in this genus, suggesting rapid speciation. Here we expanded this data matrix by adding specimens and both nuclear and mitochondrial genes. We found 2 basal clades: P. pattoni P. mantiqueirensis; and a clade split into 6 lineages: southern clade ([P. sulinus P. nigrispinus] P. dasythrix); northeastern clade ([P. brasiliensis P. lamarum] P. blainvilii); Phyllomys sp. 1; Phyllomys sp. 2; Phyllomys sp. 3; and P. lundi. The discovery of 3 potentially new species calls for a reevaluation of the taxonomy of Phyllomys species. The combination of nuclear and mitochondrial markers increased the resolution of the tree, although the basal topology is poorly supported. The patterns of geographic distribution and phylogenetic relationships are compatible with parapatric diversification within Phyllomys through ecological gradients of latitude beginning 3.69 million years ago and of altitude 4.34 million years ago.

2011 American Society of Mammalogists
Ana Carolina Loss and YURI L. R. LEITE "Evolutionary diversification of Phyllomys (Rodentia: Echimyidae) in the Brazilian Atlantic Forest," Journal of Mammalogy 92(6), 1352-1366, (1 December 2011). https://doi.org/10.1644/10-MAMM-A-320.1
Received: 13 September 2010; Accepted: 1 June 2011; Published: 1 December 2011
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