Molecular Phylogenetics and Diversification of South American Grass Mice, Genus Akodon

Margaret F. Smith and James L. Patton

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:
Molecular Phylogenetics and Diversification of South American Grass Mice, Genus Akodon

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This chapter examines variation in the mitochondrial cytochrome b gene for 30 of the approximately 40 species of South American grass mice, genus Akodon. It observes that phylogenetic analyses encompassing both maximum parsimony and Bayesian methods consistently identified four clades, but each with varying levels of support: (1) the “varius group” from eastern Bolivia, western Paraguay, and Argentina; (2) the “boliviensis group,” a set of seven species from the high Andean and Sub-Andean grasslands that form a common phylogenetic order; (3) the “aerosus group,” an assemblage of eight species, including A. aerosus, A. affinis, A. cf. budini, A. mollis, A. orphilus, A. siberiae, and A. torques from the forested Andean slopes, plus A. albiventer from the Altiplano from southern Peru south to northern Argentina; and (4) the “cursor group,” from the coastal regions of Brazil south to Argentina.

Keywords: mitochondrial cytochrome; grass mice; Akodon; phylogenetic analyses; maximum parsimony; Bayesian methods; varius group; boliviensis group; aerosus group; cursor group

Chapter.  11851 words.  Illustrated.

Subjects: Zoology and Animal Sciences

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