New Bandicoot Species Discovered in Museum Collections
Scientific analysis of historical specimens reveals two previously unidentified Australian marsupial species.
1Decade of Scientific Investigation
A ten-year research project examining historical and modern museum specimens has identified two previously unrecognized bandicoot species. Researchers analyzed collections from across Australia and New Guinea to reshape the understanding of the Isoodon genus. This comprehensive study utilized genetic samples and detailed skull measurements to clarify complex evolutionary relationships among marsupials.
2Uncovering Hidden Species
The study identified the little brown bandicoot, Isoodon microtis, which likely went extinct a century ago. Specimens had remained unnoticed in museum drawers for generations before this analysis. Additionally, the New Guinea brown bandicoot, previously classified as a subspecies, was confirmed as a distinct species in its own right through genetic testing.
3Redefining Historical Ranges
The research significantly expanded the known historical range of the quenda, or southeastern brown bandicoot. Previously considered a Western Australian species, evidence shows it once inhabited areas around Adelaide, Kangaroo Island, and the Nuyts Archipelago. This discovery marks a major eastward extension of the species' historical footprint across the Australian continent.
4New Subspecies Classifications
Beyond identifying new species, the team described several new subspecies within existing groups. Findings include two new subspecies of the golden bandicoot and four of the quenda. Furthermore, a new subspecies of the northern brown bandicoot was identified from Cape York in Queensland, highlighting a richer historical diversity than previously understood.
5Impact on Conservation Planning
Taxonomy serves as the foundation for effective conservation planning and resource allocation. The revised classifications directly influence how scientists perceive extinction risks for various populations. For instance, the quenda may be less threatened than previously believed, while the southern brown bandicoot might face greater risks due to a more restricted range.
6South Australian Biodiversity Revision
The study dramatically altered the understanding of bandicoot diversity in South Australia. Previous classifications suggested only one species, the southern brown bandicoot, existed in the state. The new revision confirms that South Australia was once home to three distinct species: the southern brown bandicoot, the little brown bandicoot, and the quenda.
7Methodology and Global Collaboration
Researchers traveled through Europe and the United States in 2016 to study specimens collected over 100 years ago. By comparing these with Australian material and utilizing the OZ Mammals Genomics initiative, they reassessed population relationships. This rigorous approach allowed the team to identify overlooked species that had been misclassified for decades.
8Future Research Directions
With the short-nosed bandicoot project complete, researchers are shifting focus to the long-nosed bandicoot genus, Perameles. Five species within this group have already disappeared since European settlement. This ongoing work demonstrates that remarkable discoveries remain hidden in museum collections worldwide, waiting to reveal further chapters of Australia's complex natural history.
Original article: The Independent Science — New Bandicoot Species Discovered in Museum Collections