False antechinus

The genus Pseudantechinus are members of the order Dasyuromorphia. They are often called false antechinuses, although this genus includes the sandstone dibbler, which was previously assigned to a different genus.

False antechinuses
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Dasyuromorphia
Family: Dasyuridae
Subfamily: Dasyurinae
Tribe: Dasyurini
Genus: Pseudantechinus
Tate, 1947
Type species
Phascogale macdonnellensis
Spencer, 1896
Species

The species of this genus are as follows:

Pseudantechinus macdonellensis

Taxonomy

Scientific Name: Pseudantechinus macdonellensis Common Name: English-Fat-tailed-Antechinus, Fat-tailed Pseudantechinus[1]

Habitat and Geographic Range

The P. macdonellensis is commonly found in the rocky environments of Central Australia.[2]

General Facts

A P. macdonellensis is a medium-sized dasyurid marsupial that ranges from 18-33 grams, and has a life span of about seven years.[3] It is presumed to have a large population, and generally lives within the confines of protected areas. Therefore, it is unlikely to decline at the rate needed to be listed as an endangered species.[4]

Diet

The P. macdonellensis is generally an insectivore whose diet consists of beetles, grasshoppers, and termites. A characteristic specific to this kind of species is its ability to store fat in its tail when food is plentiful.[5]

Torpor

In the winter most free ranging P. macdonellensis go into a state of torpor after midnight within the confines of rock crevices, and stay there until day breaks. In the morning, while they are still torpid, they move from the rock-crevices to basking sites exposed to the sun. Subsequently, this type of basking continues for the rest of the day. It appears that daily torpor is done in order to reduce the amount of daily metabolic expenditure by about 30%, and allows the species to live and reproduce in a challenging environment.[6] It has also been observed that the species goes into a state of torpor at air temperatures ranging from -1 °C to 36 °C, and often occurs under circumstances in which the species finds itself under acute energetic stress.[7]

Gestation

Males and females of the subdivision P. macdonellensis reach sexual maturity at about 350 days of age. A single gestation period takes about 43 days in the females, and produces a single litter of about six. The interval in between gestation periods is about 365 days.[8]

Pseudantechinus mimulus

Taxonomy

Scientific Name: Pseudantechinus mimulus Common Name: Alexandria False Antechinus, Carpentaria Pseudantechinus[9]

Habitat and Geographic Range

The P. mimulus is endemic to Australia. More specifically they are restricted to Sir Edward Pellew Group (Northern Territory), Centre and Southwest Islands, and two locations near Queensland. In the 1988 census of the territories the species was found in the Centre and South West Islands, but in the 2003 census it was not located. It is believed that the P. mimulus stile resides within that area, but is yet to be confirmed.[10] In addition, the habitat in which the species resides in is a rocky one with scattered trees and wood.[11]

General

The P. mimulus is classified as an endangered species. Its endangerment is due to the decline in habitat quality and extent as a result of fire, introduced predators, and mining.[12]

Diet

While a lot of details about the species diet is unknown, it is believed that they eat mostly invertebrates as well as some small vertebrates.[13]

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References
  1. "Pseudantechinus macdonnellensis (Fat-tailed Antechinus, Fat-tailed Pseudantechinus)". IUCN Red List of Threatened Species.
  2. http://www.publish.csiro.au/?act=view_file&file_id=AM05227.pdf
  3. http://www.publish.csiro.au/?act=view_file&file_id=AM05227.pdf
  4. "Pseudantechinus macdonnellensis (Fat-tailed Antechinus, Fat-tailed Pseudantechinus)". IUCN Red List of Threatened Species.
  5. "Fat-tailed False Antechinus (Pseudantechinus macdonnelliensis)".
  6. Geiser, Fritz; Pavey, Chris R. (2007). "Basking and torpor in a rock-dwelling desert marsupial: survival strategies in a resource-poor environment". Journal of Comparative Physiology B. 177 (8): 885–892. doi:10.1007/s00360-007-0186-z. PMID 17674010.
  7. Körtner, G; Geiser, F (2009). "The key to winter survival: daily torpor in a small arid-zone marsupial". Naturwissenschaften. 96 (4): 525–530. doi:10.1007/s00114-008-0492-7. PMID 19082573.
  8. "Fat-tailed pseudantechinus | Pseudantechinus macdonnellensis facts".
  9. "Pseudantechinus mimulus (Carpentarian Antechinus, Carpentarian Pseudantechinus)". IUCN Red List of Threatened Species.
  10. "Pseudantechinus mimulus — Carpentarian Antechinus".
  11. "Pseudantechinus mimulus (Carpentarian Antechinus, Carpentarian Pseudantechinus)". IUCN Red List of Threatened Species.
  12. "Pseudantechinus mimulus (Carpentarian Antechinus, Carpentarian Pseudantechinus)". IUCN Red List of Threatened Species.
  13. "Pseudantechinus mimulus — Carpentarian Antechinus".
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