Tokudaia

Tokudaia Temporal range: Late to Recent
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Infraclass:	Eutheria
Superorder:	Euarchontoglires
Order:	Rodentia
Suborder:	Myomorpha
Superfamily:	Muroidea
Family:	Muridae
Subfamily:	Murinae
Tribe:	Apodemurini
Genus:	Tokudaia Kuroda, 1943
Species
See text.

See text.

Tokudaia is a genus of murine rodent native to Japan. Known as Ryūkyū spiny rats or spinous country-rats, population groups exist on several non-contiguous islands. Despite differences in name and appearance, they are the closest living relatives of the Eurasian field mouse (Apodemus). Of the three species, both T. osimensis and T. tokunoshimensis have lost their Y chromosome and SRY gene; the sex chromosomes of T. muenninki, on the other hand, are abnormally large.

Named species are:

At least Tokudaia osimensis may be a cryptic species complex.

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