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Molecular phylogenetic relationships of two extinct potoroid marsupials, Potorous platyops and Caloprymnus campestris (Potoroinae: Marsupialia)

journal contribution
posted on 2004-05-01, 00:00 authored by M Westerman, Stella LokeStella Loke, M S Springer
Complete 12S rRNA and partial cytochrome b (cytb) gene sequences have been obtained from museum samples of two recently extinct potoroids - Potorous platyops and Caloprymnus campestris. Phylogenetic analyses based on these mitochondrial DNA sequences suggest that the broad-faced potoroo (P. platyops) was a close relative of the recently discovered Potorous longipes and the recently re-discovered Potorous gilberti. Although the extinct desert rat-kangaroo (C. campestris) was clearly resolved as a member of the subfamily Potoroinae, its precise relationships vis a vis other living potoroines are unclear. We confirmed that the rufous rat-kangaroo (Aepyprymnus rufescens) is sister to all living Bettongia species, but the molecular data provide no support for a sister relationship between A. rufescens and C. campestris as suggested by Flannery (1989) on the basis of four shared morphological characters. Molecular dating analyses suggest that the initial radiation of potoroinae seems to have occurred soon after its origin in the early Miocene. Within Potoroinae, C. campestris diverged from other taxa approximately 16 million years ago. P. platyops diverged from P. longipes + P. gilberti approximately 14-15 million years ago.

History

Journal

Molecular Phylogenetics and Evolution

Volume

31

Issue

2

Pagination

476 - 485

Publisher

Academic Press

Location

Maryland Heights, Mo.

ISSN

1055-7903

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2003, Elsevier

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