Tamias

Tamias is a genus of chipmunks in the tribe Marmotini of the squirrel family. The genus includes a single living species, the eastern chipmunk (Tamias striatus).^[1] The genus name Tamias (Greek: ταμίας) means "treasurer", "steward", or "housekeeper",^[2] which is a reference to the animals' role in plant dispersal through their habit of collecting and storing food for winter use.^[3]

Caged Tamias chipmunk, Tokyo area

Tamias
Eastern chipmunk (Tamias striatus)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Sciuridae
Tribe:	Marmotini
Genus:	Tamias Illiger, 1811
Species
Tamias striatus

The genus Tamias was formerly divided into three subgenera that, in sum, included all chipmunk species: Tamias, the eastern chipmunk and other fossil species; Eutamias, of which the Siberian chipmunk (E. sibiricus) is the only living member; and Neotamias, which includes the 23 remaining, mostly western, species. These classifications are subjective, and most taxonomies over the twentieth century have placed the chipmunks in a single genus. However, studies of mitochondrial DNA show that the divergence between each of the three chipmunk groups is comparable to the genetic dissimilarity between Marmota and Spermophilus,^[4][5][6][7] so they are now often considered as separate genera.

In addition to the eastern chipmunk, some fossil species from Eurasia have been assigned to this genus:

• †Tamias allobrogensis; Mein and Ginsburg, 2002 – Miocene of France^[8]
• †Tamias atsali; De Bruijn, 1995 – Pliocene of Greece^[9]
• †Tamias eviensis; De Bruijn et al., 1980 – Miocene of Greece^[10]
• †Tamias urialis; Munthe, 1980, described from the Miocene of Pakistan, may be more closely related to Tamiops.^[11]

One American fossil species, †Tamias aristus from the late Pleistocene, has been identified.^[12]

References

1. Musser et al., 2010, p. 22
2. Henry George Liddell; Robert Scott. (1940). A Greek-English Lexicon, revised and augmented throughout by Sir Henry Stuart Jones with the assistance of Roderick McKenzie. Oxford: Clarendon Press.
3. Snyder, D.P. (1982). "Tamias striatus". Mammalian Species (168): 1–8. doi:10.2307/3503819. JSTOR 3503819.
4. Wilson, D. E.; D. M. Reeder (2005). "Mammal Species of the World". Archived from the original on 2007-06-23. Retrieved 2007-06-27.
5. Piaggio, A. J.; Spicer, G. S. (2001). "Molecular phylogeny of the chipmunks inferred from mitochondrial cytochrome b and cytochrome oxidase II gene sequences" (PDF). Molecular Phylogenetics and Evolution. 20 (3): 335–350. doi:10.1006/mpev.2001.0975. PMID 11527462. Archived from the original (PDF) on 2012-08-23. Retrieved 2018-11-02.
6. Piaggio, Antoinette J.; Spicer, Greg S. (2000). "Molecular Phylogeny of the Chipmunk Genus Tamias Based on the Mitochondrial Cytochrome Oxidase Subunit II Gene" (PDF). Journal of Mammalian Evolution. 7 (3): 147–166. doi:10.1023/a:1009484302799. S2CID 7623018. Archived from the original (PDF) on 2011-09-13. Retrieved 2018-11-02.
7. Musser, G. G.; Durden, L. A.; Holden, M. E.; Light, J. E. (2010). "Systematic review of endemic Sulawesi squirrels (Rodentia, Sciuridae), with descriptions of new species of associated sucking lice (Insecta, Anoplura), and phylogenetic and zoogeographic assessments of sciurid lice". Bulletin of the American Museum of Natural History. 339 (339): 1–260. doi:10.1206/695.1. hdl:2246/6067. S2CID 82712592.
8. Mein and Ginsburg, 2002
9. De Bruijn, 1995
10. Doukas, 2003, table 2
11. Qiu et al., 2008, p. 115
12. Ray, Clayton E (September 1965). "A New Chipmunk, Tamias aristus, from the Pleistocene of Georgia". Journal of Paleontology. 39 (5): 1016–1022. JSTOR 3555320.