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| Spinifex Hopping-mouse | |
|---|---|
| Name | Spinifex Hopping-mouse |
| Status | Vulnerable |
| Status system | IUCN3.1 |
| Genus | Notomys |
| Species | alexis |
| Authority | Thomas, 1910 |
Spinifex Hopping-mouse is a small Australian rodent of the genus Notomys described by Oldfield Thomas in 1910, notable for its bipedal locomotion, xeric adaptations, and association with spinifex grasslands. The species has been the subject of field studies by institutions such as the Australian Museum, the Commonwealth Scientific and Industrial Research Organisation, and universities including the University of Sydney and the University of Western Australia. Conservation attention has involved agencies like the IUCN, the Australian Department of Agriculture, Water and the Environment, and state wildlife services.
The species was named by Oldfield Thomas in 1910 and placed in the genus Notomys, within the family Muridae. Taxonomic treatments have been published in works by the British Museum (Natural History) and revised in regional faunal accounts from the Australian Museum and the Museum Victoria. Molecular phylogenetics involving researchers at the Australian National University and comparisons with genera such as Pseudomys have clarified relationships among Australian native rodents. Nomenclatural changes and subspecies designations have appeared in checklists endorsed by the Australian Society for Fish Biology and fauna atlases compiled by the Atlas of Living Australia.
Adults typically measure body lengths comparable to other Notomys species recorded in surveys by the CSIRO and museum collections at the Queensland Museum. The species exhibits large hind limbs adapted for saltatory movement noted in morphological studies by researchers affiliated with the University of Melbourne and the Royal Society. Pelage coloration blends with dune and spinifex substrates described in field guides published by the Field Naturalists Club of Victoria and the Western Australian Museum. Diagnostic characters such as auditory bullae size, tail tufting, and dental formula are detailed in taxonomic keys used by staff at the Natural History Museum, London and curators at the American Museum of Natural History.
Range maps produced by the IUCN and state departments show occurrences across arid zones of central and western Australia with records in bioregions managed by the Northern Territory Government, the Government of Western Australia, and the South Australian Department for Environment and Water. Habitats are dominated by hummock-forming spinifex species found in protected reserves such as the Karijini National Park and the Simpson Desert National Park. Habitat associations have been documented in ecological surveys by the Australian Wildlife Conservancy and pastoral leases monitored by the Department of Agriculture, Water and the Environment.
Saltatory locomotion and nocturnal activity patterns have been recorded in studies undertaken by the University of Adelaide and field teams from the Australian National University. Burrowing behavior and den architecture were described in ecological monographs produced by researchers at the University of New South Wales and observations noted in reports by the RSPCA Australia. Predation pressures from introduced species such as the Red fox (Vulpes vulpes) and the Feral cat have been documented by conservation programs run by the Invasive Species Council and the Department of Agriculture, Water and the Environment. Interactions with native predators including the Wedge-tailed eagle and the Dingo figure in regional food-web studies published by the CSIRO.
Foraging studies carried out by teams at the University of Tasmania and the University of Western Australia report an omnivorous diet composed of seeds, green plant material, and invertebrates, paralleling findings in rodent ecology literature from the Royal Society of New Zealand and hortological surveys by the Australian Seed Bank Partnership. Seasonal dietary shifts and resource partitioning with sympatric rodents like species in the genus Pseudomys are described in articles in journals affiliated with the Ecological Society of Australia and referenced in management plans developed by the Northern Territory Government.
Reproductive parameters including litter size, gestation length, and breeding seasonality have been investigated by researchers at the CSIRO and documented in university theses from the University of Sydney and the University of Queensland. Juvenile development and survivorship metrics are included in demographic models used by conservation bodies such as the IUCN and the Australian Wildlife Conservancy. Captive breeding experiences reported by the Melbourne Zoo and the Perth Zoo have informed translocation protocols endorsed by state wildlife agencies.
The species is listed as Vulnerable on assessments coordinated by the IUCN and under national frameworks administered by the Australian Government Department of Agriculture, Water and the Environment. Threats include habitat degradation from pastoralism and altered fire regimes managed by the Northern Territory Government and the Government of Western Australia, as well as predation by introduced mammals addressed by programs from the Invasive Species Council and eradication projects supported by the Australian Wildlife Conservancy. Recovery actions have involved partnerships among the Commonwealth Scientific and Industrial Research Organisation, regional land councils, and protected area management agencies such as those overseeing Kakadu National Park and Uluru-Kata Tjuta National Park.