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Chrotomys

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Mammalia
Subclassis: Theria
Infraclassis: Placentalia
Ordo: Rodentia
Subordo: Myomorpha
Superfamilia: Muroidea
Familia: Muridae
Subfamilia: Murinae
Genus: Chrotomys
Species: C. gonzalesi - C. mindorensis - C. sibuyanensis - C. silaceus - C. whiteheadi

Name

Chrotomys Thomas, 1895

References

* Chrotomys on Mammal Species of the World.
Mammal Species of the World: A Taxonomic and Geographic Reference, 2 Volume Set edited by Don E. Wilson, DeeAnn M. Reeder

Synonyms:

* Celaenomys Thomas, 1898

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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

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

Genus Chrotomys - Luzon striped rats

* Luzon Striped Rat, Chrotomys whiteheadi
* Mindoro Striped Rat, Chrotomys mindorensis
* Isarog Striped Shrew-Rat, Chrotomys gonzalesi
* Blazed Luzon Shrew Rat, Chrotomys silaceus
* Sibuyan Striped Shrew Rat, Chrotomys sibuyanensis


Relationships as inferred by cytochrome b

Chrotomys

Chrotomys silaceus




Chrotomys sibuyanensis




Chrotomys gonzalesi



Chrotomys whiteheadi





Relationships as inferred by morphology

Chrotomys


Chrotomys sibuyanensis



Chrotomys silaceus





Chrotomys gonzalesi




Chrotomys midorensis



Chrotomys whiteheadi





References

* 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.

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Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License