Notoryctes caurinus

Geographic Range

Northern marsupial moles, Notoryctes caurinus are found in north-central Western Australia in and around the Great Sandy, Little Sandy, Gibson, and Great Victoria deserts. Specimens have been collected from Sturt Creek, Wallal Downs, Balgo Hill Mission, Warburton Range, the Canning Stock Route, Talawanna Track, and Nifty Mine. They have been sighted in other areas in north Western Australia, though their range is limited.

• Biogeographic Regions
• australian australian
  • native native

Habitat

Northern marsupial moles are fossorial and inhabit sand dunes, sandplains, dunefields, inter-dunal flats, and sandy soils along river flats. These habitats allow swift movement through burrow systems underground. Preferred habitat is sometimes associated with spinifex ( Triodia basedowii ). Although they spend the majority of their time underground, northern marsupial moles do surface occasionally, particularly in wet, cool weather. Because they cannot travel very far above ground, they prefer continuous areas of suitable habitat. Northern marsupial moles generally travel 0.1 to 2.5 m below the surface.

• Habitat Regions
• terrestrial terrestrial

• Terrestrial Biomes
• desert or dune desert or dune

Physical Description

Northern marsupial moles are very similar to in appearance to placental moles and have body characteristics comparable to golden moles, gophers, and mole rats. They have short, dense, cream colored fur, a reduced tail, and a tubular body shape. They also have short, strong forelimbs for digging, large flat claws on their third and fourth digits, keratinized skin on their snout, slit-like nostrils, and a pouch that opens to its posterior. Northern marsupial moles lack functional eyes and outer ear pinnae. Differentiating between sexes is difficult, as males have internal testes. Internally, northern marsupial moles have a conical skull that is thin-walled dorsally and anteriorly while strong at the basicranial region. The strengthened vertebral column is flat and and fused at vertebrae 4 and 5.

Northern marsupial moles are smaller but otherwise very similar in appearance to southern marsupial moles ( Notoryctes typhlops ). They weigh 30 to 70 g (40 g average) and measure 100 to 205 mm (160 mm average) in length.

• Other Physical Features
• endothermic endothermic
• bilateral symmetry bilateral symmetry

• Sexual Dimorphism
• sexes alike

Reproduction

Little is known about the mating systems of northern marsupial moles.

As they are infrequently observed, little is known about the reproductive habits of northern marsupial moles. Because females have two teats within their pouch, they are thought to have a maximum of 2 offspring per litter. Young move directly to the pouch after birth. Northern marsupial moles breed around November.

• Key Reproductive Features
• iteroparous iteroparous
• seasonal breeding seasonal breeding
• gonochoric/gonochoristic/dioecious (sexes separate)
• sexual sexual

Northern marsupial moles are born underdeveloped and move to the mother's pouch directly after birth. Mothers lactate for an unknown period of time. There is no evidence of paternal investment.

• Parental Investment
• altricial altricial
• female parental care female parental care
• pre-hatching/birth
  • provisioning
    • female
  • protecting
    • female
• pre-weaning/fledging
  • provisioning
    • female
  • protecting
    • female

Lifespan/Longevity

The lifespan of northern marsupial moles is currently unknown. Individuals of a similar species, Notoryctes typhlops , are expected to live 1.5 years in the wild.

Behavior

Northern marsupial moles are solitary fossorial marsupials and are rarely observed by humans. Above ground, they shuffle side-to-side and are slow, clumsy, and vulnerable to predators. The energetic cost of sand-swimming underground is much less than above ground travel. They normally tunnel 10 cm to 2.5 m under the surface. Because sand fills in behind them, they do not leave permanent tunnels.

• Key Behaviors
• fossorial fossorial
• motile motile
• solitary solitary

Home Range

Little is known regarding the home range of northern marsupial moles.

Communication and Perception

Northern marsupial moles perceive their environment with their forelimbs and via structures in their inner ear. These structures allow them to sense orientation while underground. They likely sense shifts in sand, which helps them identify prey location. Because of their fossorial lifestyle, they lack functional eyes and tissue has grown over the area where eyes would be.

• Communication Channels
• tactile tactile
• acoustic acoustic

• Perception Channels
• tactile tactile
• vibrations vibrations
• chemical chemical

Food Habits

Northern marsupial moles primarily consume invertebrates found underground. They also consume small salamanders, small lizards, eggs, as well as some seeds and vegetable matter. Specifically they prey on beetles, beetle larvae and pupae, ant eggs, and centipedes.

• Primary Diet
• carnivore carnivore
  • insectivore insectivore
• omnivore omnivore

• Animal Foods
• amphibians
• reptiles
• eggs
• insects

• Plant Foods
• leaves
• seeds, grains, and nuts

Predation

Northern marsupial moles spend most of their time underground, allowing them to avoid predators. However, on the surface their slow, clumsy movements make them vulnerable to predation. Remains of this species have been found in the feces of red foxes ( Vulpes vulpes ), feral cats ( Felis catus ), and dingos ( Canis lupus dingo ).

Ecosystem Roles

Northern marsupial moles aerate soil and redistribute underground materials. They may also affect populations of undergrad invertebrates that are an important part of their diet.

• Ecosystem Impact
• soil aeration soil aeration

Economic Importance for Humans: Positive

Northern marsupial moles have been featured in aboriginal mythology for thousands of years. Their daily movement aerates soil, which may aid agricultural practices. They may also control populations of insects.

Economic Importance for Humans: Negative

There are no known adverse effects of northern marsupial moles on humans.

Conservation Status

Northern marsupial moles are generally considered endangered, though they are considered "Data Deficient" by the IUCN due to their rareness. This species has been known to science for over a century and to indigenous peoples for thousands of years. The numbers of specimens collected has considerably decreased in recent years, appearing in museums at a rate of 5 to 15 per decade. In addition to predation, changes in fire and grazing regimes threaten northern marsupial moles. Conservation efforts have been implemented since the publication of Joe Benshemesh’s Recovery Plan in 2004, and additional research is underway to determine further conservation efforts.

Additional Links

Encyclopedia of Life

Contributors

Ben Wasleske (author), University of Wisconsin-Stevens Point, Christopher Yahnke (editor), University of Wisconsin-Stevens Point, Gail McCormick (editor), Animal Diversity Web Staff.

References

Benshemesh, J., A. Burbidge. 2008. "Notoryctes caurinus" (On-line). In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. Accessed February 21, 2012 at http://www.iucnredlist.org/apps/redlist/details/14878/0 .

Benshemesh, J. 2004. Recovery Plan for Marsupial Moles Notoryctes typhlops and N. caurinus, 2005-2010 . Alice Springs: Northern Territory Department of Infrastructure.

Benshemesh, J., K. Johnson. 2003. Biology and Conservation of Marsupial Moles. Pp. 464-475 in Predators With Pouches: The Biology of Carnivorous Marsupials . Collingwood VIC, Australia: CSIRO Publishing.

Department of Sustainability, Environment, Water, Population and Communities, 2012. "Notoryctes caurinus" (On-line). Species Profile and Threats Database, Department of Sustainability, Environment, Water, Population and Communities, Canberra. Accessed February 21, 2012 at http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=295 .

Kearns-White, R. 1998. Eye Can't Believe It!. Life , 21/11: 44.

Ladeveze, S., R. Asher, M. Sanchez-Villagra. 2008. Petrosal anatomy in the fossil mammal Necrolestes : evidence for metatherian affinities and comparisons with the extant marsupial mole. Journal of Anatomy , 213: 686-697.

Pearson, D., J. Turner. 2000. Marsupial Moles Pop Up in the Great Victoria and Gibson Deserts. Australian Mammalogy , 22: 115-119.

Warburton, N. 2003. The 3-Dimensional Anatomy of the North-Western Marsupial Mole. Records of the Western Australian Museum , 22/1: 1-7.

Withers, P., G. Thompson, R. Seymour. 2000. Metabolic Physiology of the North-western Marsupial Mole, Notoryctes caurinus. Australian Journal of Zoology , 48: 241-258.

de Magalhaes, J., J. Costa. 2009. A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology , 22/8: 1770-1774. Accessed August 15, 2012 at http://genomics.senescence.info/species/entry.php?species=Notoryctes_typhlops .

2012. "Marsupial Moles: Notoryctemorphia - Behavior And Reproduction" (On-line). Accessed February 21, 2012 at http://animals.jrank.org/pages/2648/Marsupial-Moles-Notoryctemorphia-BEHAVIOR-REPRODUCTION.html .

2012. "Northern Marsupial Mole, Northwestern Marsupial Mole (Notoryctes caurinus)" (On-line). Accessed February 21, 2012 at http://www.edgeofexistence.org/mammals/species_info.php?id=30 .