A Molecular Reappraisal of the Systematics of the Leaf-Eared Mice Phyllotis and their Relatives

Scott J. Steppan, O. Ramirez, Jenner Banbury, Dorothée Huchon, Víctor Pacheco, Laura I. Walker and Angel E. Spotorno

in The Quintessential Naturalist

Published by University of California Press

Published in print July 2007 | ISBN: 9780520098596
Published online March 2012 | e-ISBN: 9780520916159 | DOI:
A Molecular Reappraisal of the Systematics of the Leaf-Eared Mice Phyllotis and their Relatives

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This chapter reports on phylogenetic analyses of both mitochondrial (1,185 bp of the complete cytochrome b gene (cyt b) and flanking (tRNA) and nuclear (1300 bp of the nuclear recombination activating gene 1, RAG1) DNA for 13 species of Phyllotis, including two undescribed species. It also includes published and new sequences for 19 other philistine species. The chapter observes that a second described species, from Argentina, appears to be the sister species to P. osilae, and that together these are the sister groups to all other Phyllis s. s. It notes that the darwini species-group is supported by cyt b data, within which the widespread species P. xanthopygus is characterized by deep divergences, high genetic diversity, and paraphyly with respect to at least two morphological species, limatus and bonariensis. The chapter further notes that its application of different calibrations and methods suggests that phyllotine divergence dates estimated by Salazar-Bravo et al. (2001) may be too old, with respect to molecular clock estimates of divergence dates.

Keywords: phylogenetic analyses; mitochondrial; nuclear; DNA; Phyllotis; P. osilae; darwini; P. xanthopygus; limatus; bonariensis

Chapter.  10054 words.  Illustrated.

Subjects: Zoology and Animal Sciences

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