Cryptic grey-bellied dunnart (Sminthopsis griseoventer) discovered in South Australia: genetic, morphological and subfossil analyses show the value of collecting voucher material.

Catherine Kemper, Steven Cooper, Graham Medlin, Mark Adams, David Stemmer, Kathleen Saint, Matthew McDowell, Jeremy Austin

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    The assumption that almost all mammal species are known to science has led to a recent trend away from collecting voucher specimens/tissues during field studies. Here we present a case study of a recently discovered cryptic marsupial (Sminthopsis griseoventer) in South Australia (SA) and show how such collections can contribute to rigorous biodiversity and biogeographic assessments. Morphological and genetic (allozyme and mitochondrial control region (CR) sequence data) analyses, including ancient DNA analyses of type material, were applied to 188 voucher specimens and 94 non-vouchered tissues of Sminthopsis held at the SA Museum. These data were used to confirm the presence of S. griseoventer in SA, validate means of identifying it morphologically and describe recent and pre-European distributions. Pelage differences between S. griseoventer and S. dolichura enabled their identification, but external measurements overlapped considerably. Subfossil S. griseoventer were identified from seven deposits and confirmed that in the past the species was more widespread in SA. CR divergences (>1.8%) among Western Australian and SA S. griseoventer suggested its long-term presence in SA. Discrepancies between the mitochondrial and allozyme affinities of S. aitkeni and S. griseoventer, coupled with the lack of obvious morphological differences, indicate that a taxonomic reappraisal of these species is warranted. The study strongly demonstrates an ongoing need for the routine collection of mammal voucher material in biological and environmental impact surveys.

    Original languageEnglish
    Pages (from-to)127-144
    Number of pages18
    JournalAustralian Journal of Zoology
    Volume59
    Issue number3
    DOIs
    Publication statusPublished - 2011

    Keywords

    • allozyme electrophoresis
    • dasyurid
    • distribution
    • mitochondrial control region
    • paratype
    • Sminthopsis aitkeni
    • Sminthopsis dolichura
    • taxonomy

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