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Giant White-tailed Rat

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Theriodontia
Subordo: Cynodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohort: Theria
Cohort: Eutheria
Cohort: Placentalia
Cladus: Boreoeutheria
Superordo: Euarchontoglires
Ordo: Rodentia
Subordo: Myomorpha
Superfamilia: Muroidea

Familia: Muridae
Subfamilia: Murinae
Genus: Uromys
Species: Uromys caudimaculatus

Uromys caudimaculatus (Krefft, 1867)


Uromys caudimaculatus in Mammal Species of the World.
Wilson, Don E. & Reeder, DeeAnn M. (Editors) 2005. Mammal Species of the World – A Taxonomic and Geographic Reference. Third edition. ISBN 0-8018-8221-4.

The giant white-tailed rat (Uromys caudimaculatus) is an Australian rodent native to tropical rainforest of north Queensland,[2] with subspecies occurring in New Guinea and the Aru Islands.[3] It is one of the largest rodents in Australia, reaching up to 1 kg in weight.[4] It is grey-brown above, cream to white below, and has a long, naked tail of which the distal section is white (Moore 1995).

Breeding commences in September or October, peaking in December and January at the height of the wet season. After a gestation of 36 days, a litter of two to three (rarely four) young are born, and remain with the mother for approximately three months (Moore 1995).
Common names

The common name of this species has long been white-tailed rat or giant white-tailed rat. During the 1990s there was a push for such descriptive English common names to be replaced with indigenous Australian names, and accordingly, in 1995 the Australian Nature Conservation Agency published recommendations for the common names of rodents. They compiled six indigenous names for this species: the Yidiny name Durrgim; the Jaabugay name Durrkin; the Gnog names Jikoy, Koojang and Parrongkai; and the Kuuku Ya'u name Thupi. Despite this they recommended the adoption of the name Mati, which is a general name for rats and mice recorded from the vicinity of the Peach River on Cape York.[5] However this recommendation was not prescriptive, and it remains to be seen to what extent it will be adopted.

It is known as kabkal in the Kalam language of Papua New Guinea.[6]

Aplin, K.; Helgen, K.; Winter, J. (2017). "Uromys caudimaculatus". IUCN Red List of Threatened Species. 2017: e.T22801A22446882. doi:10.2305/IUCN.UK.2017-2.RLTS.T22801A22446882.en. Retrieved 19 November 2021.
Harrison, J. L. (1962). "Mammals of Innisfail I. Species and distribution". Australian Journal of Zoology. 10: 45–83. doi:10.1071/ZO9620045.
Laurence, W. F.; Grant, J. D. (1994). "Photographic identification of ground-nest predators in Australian tropical rainforest". Wildlife Research. 21 (2): 241–248. doi:10.1071/WR9940241.
Moore, L. A. (1995) "Giant white-tailed rat", Uromys caudimaculatus. In: Mammals of Australia. (Ed, Strahan, R.) pp. 638–640. Reed Books, Chatswood, NSW.
Braithwaite R. W.; et al. (1995). Australian names for Australian rodents. Australian Nature Conservation Agency. ISBN 0-642-21373-9.
Pawley, Andrew and Ralph Bulmer. 2011. A Dictionary of Kalam with Ethnographic Notes. Canberra. Pacific Linguistics.

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