Ryukyu spiny rat

The Ryukyu spiny rat (Tokudaia osimensis) is a species of rodent in the family Muridae.^[2] Endemic to Amami Ōshima island in the Amami Islands of the Ryukyu archipelago of Japan, its natural habitat is subtropical moist broadleaf forest. The karyotype has an odd diploid number, 2n = 25.^[2] Like its relative T. tokunoshimensis, it has lost its Y chromosome and SRY gene.^[3]

Ryukyu spiny rat
Conservation status
Endangered  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Muridae
Genus:	Tokudaia
Species:	T. osimensis
Binomial name
Tokudaia osimensis (Y. Abe, 1934)

The species is threatened by habitat destruction and fragmentation, predation by feral cats and dogs and introduced mongooses, and competition with introduced black rats.^[1]

See also

• Ellobius lutescens
• Ellobius tancrei