Chrotomys

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Chrotomys
Temporal range: None
Chrotomys whiteheadi.jpg
Chrotomys whiteheadi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Muridae
Subfamily: Murinae
Genus: Chrotomys
Thomas, 1895
Species

Chrotomys whiteheadi
Chrotomys mindorensis
Chrotomys gonzalesi
Chrotomys silaceus
Chrotomys sibuyanensis

Chrotomys silaceus (upper animal)

The genus Chrotomys contain a unique group of rodents found only in the Philippines, specifically the islands of Luzon, Mindoro, and Sibuyan. Instead of being predominantly herbivorous or omnivorous like other murines, these rats feed predominantly on invertebrates although they do eat some vegetable matter. This vermivory is probably the result of a rat-like animal moving into an ecological niche usually filled by shrews. Shrews and other insectivores are absent on these Philippine islands.

Taxonomy[edit]

Rickart et al. (2005) found that C. mindorensis, C. whiteheadi, and C. gonzalesi are closely related whereas C. silaceus and C. sibuyanensis represent earlier offshoots of the genus. Several authors place C. silaceus in the genus Celaenomys, but Rickart et al. (2005) suggest that neither genetic nor morphometric distance warrant it.

These rats are considered "old endemics" and are probably the result of one of the first colonisations of the Philippine islands. Other murines colonised the islands at a later time and are more closely related to mainland murines.

Species[edit]

Genus Chrotomys - Luzon striped rats

Relationships as inferred by cytochrome b[edit]

Chrotomys

Chrotomys silaceus




Chrotomys sibuyanensis




Chrotomys gonzalesi



Chrotomys whiteheadi





Relationships as inferred by morphology[edit]

Chrotomys


Chrotomys sibuyanensis



Chrotomys silaceus





Chrotomys gonzalesi




Chrotomys mindorensis



Chrotomys whiteheadi





References[edit]

  • Nowak, R.M. 1999. Walker's Mammals of the World, Vol. 2. Johns Hopkins University Press, London.
  • Rickart, E. A., L. R. Heaney, S. M. Goodman, and S. Jansa. 2005. Review of the Philippine genera Chrotomys and Celaenomys (Murinae) and description of a new species. Journal of Mammalogy, 86:415-428.