Argentine fat-tailed mouse opossum

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Argentine fat-tailed mouse opossum
Scientific classification
T. sponsorius
Binomial name
Thylamys sponsorius
Thomas, 1921
Thylamys sponsorius area.png
Argentine fat-tailed mouse opossum range

The Argentine fat-tailed mouse opossum (Thylamys sponsorius) is a species or subspecies of opossum in the family Didelphidae.[2] It is found in the eastern foothills of the Andes in northern Argentina and southern Bolivia.[1] Its dorsal fur is gray brown to dark brown. Its ventral fur is gray-based except for the white to yellowish chest hairs. It has been distinguished from T. cinderella by its postorbital ridges. T. cinderella has well-developed postorbital ridges in both juveniles and adults that extend laterally behind the eye sockets. Only adults of T. sponsorius have fully developed postorbital ridges, and these do not extend laterally behind the eye sockets.[3] However, mitochondrial DNA sequence analysis does not support the population being distinct from T. cinderella.[4][5]


  1. ^ a b Diaz M. & Barquez, R. (2008). "Thylamys sponsorius". IUCN Red List of Threatened Species. Version 2008. International Union for Conservation of Nature. Retrieved 20 March 2009.
  2. ^ Gardner, A.L. (2005). "Order Didelphimorphia". In Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 18. ISBN 978-0-8018-8221-0. OCLC 62265494.
  3. ^ Gardner, Alfred L. (2008). Mammals of South America: Marsupials, xenarthrans, shrews, and bats. University of Chicago Press. p. 669. ISBN 0-226-28240-6.
  4. ^ Flores, D. (2016). "Thylamys cinderella". IUCN Red List of Threatened Species. IUCN. 2016: e.T51343307A22173237. doi:10.2305/IUCN.UK.2016-2.RLTS.T51343307A22173237.en. Retrieved 28 October 2017.
  5. ^ Braun, J.K.; et al. (2005). "Phylogenetic and biogeographic relationships of mouse opossums Thylamys (Didelphimorphia, Didelphidae) in southern South America". Journal of Mammalogy. 86 (1): 147–159. doi:10.1644/1545-1542(2005)086<0147:PABROM>2.0.CO;2.