WIKIMEDIA, KATRIN SOLMDORFFScientists in the Australian state of Queensland have discovered three new species of a rodent-like marsupial that belong to a genus in which males die off in great numbers at the conclusion of the mating season. Antechinus is a genus of marsupial widespread in Australia renowned for its semelparity, a life-history characteristic common to salmon and some insects in which adults expire shortly after mating. Researchers announced one of the new species, the black-tailed antechinus (Antechinus arktos), in a recent issue of Zootaxa. They used mitochondrial DNA sequencing to confirm that the black-tailed antechinus, which can be found in the mountains of southwest Queensland, was in fact a distinct species and not a mainland form of the dusky antechinus (A. swainsonii mimetes).
“It’s a very exciting time to be a mammalogist,” Andrew Baker, head of the Queensland University of Technology team that made the discoveries, told The Guardian. “Typically there’s only a couple of new species of mammals found worldwide each year. So to find three new species of this marsupial, all in South East Queensland is really exciting.”
Antechinus species are likely unique among mammals in exhibiting semelparity, which was discovered in the animals last year after researchers found scads of males dying at the end of each mating season, their bodies practically disintegrating due to the stress of vigorous copulation. Baker and his colleagues have applied for endangered species status for the black-tailed antechinus, its populations shrunken and hemmed in by climate change.