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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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

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

La Filogenética Molecular Y La Diversificación De Los Ratones Campestres De Sudamérica Del Genero Akodon

(p.827) Molecular Phylogenetics and Diversification of South American Grass Mice, Genus Akodon
The Quintessential Naturalist

Margaret F. Smith

James L. Patton

University of California Press

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

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