Genetic variation within the Murina species group, which includes S. murina, S. gilberti, S. leucopus, S. dolichura and S. archeri, was examined through analyses of complete 12S rRNA, partial control region mitochondrial DNA sequences and partial omega-globin nuclear DNA sequences. Sminthopsis butleri was found to be an additional member of the Murina group, and appears to be most closely related to S. leucopus rather than the morphologically similar S. archeri. This latter species appears to be the most divergent member of the group, and there is a possible sister relationship between S. murina and S. gilberti, as suggested by previous allozyme evidence. It appears that the systematic affinities of the taxonomically problematic northeastern Queensland populations of both S. murina and S. leucopus and a disjunct population of S. gilberti (from the Western Australia/South Australia border) are indeed with those respective species; although each appears to belong to a distinct morphological and genetic lineage. A specimen of S. leucopus from Queensland was found to be as divergent from each of the southeastern Australian S. leucopus subspecies as they are from each other, suggesting that this northern population of S. leucopus may also warrant recognition as a distinct taxon. Specimens of S. murina murina were found to be genetically divergent from each other, and this subspecies appears to be paraphyletic, as suggested by previous morphological evidence.
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Acknowledgments
We would like to thank those people who donated and helped obtain samples for this study; these include P. A. Woolley (La Trobe University) and Mark Adams (South Australian Museum). We thank J. Birrell and M. Kreig (South Australian Museum) for technical and curatorial assistance, and Mark Adams for information regarding allozyme screeening of S. murina and S. leucopus. This work was supported by an Australian Postgraduate award to M.B., a grant from the National Science Foundataion (DEB-9419907) to C.K., and funds from La Trobe University and the South Australian Museum.
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* This paper is the second part of a series dealing with the systematics and evolution of the dasyurid marsupial genus Sminthopsis. Part one covered the Macroura species group and was published in 2001 in the Journal of Mammalian Evolution8, 149–170.
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Blacket, M.J., Cooper, S.J.B., Krajewski, C. et al. Systematics and Evolution of the Dasyurid Marsupial Genus Sminthopsis: II. The Murina Species Group. J Mammal Evol 13, 125–138 (2006). https://doi.org/10.1007/s10914-006-9008-4
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DOI: https://doi.org/10.1007/s10914-006-9008-4