Tokudaia tokunoshimensis

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Tokunoshima spiny rat
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Muridae
Genus: Tokudaia
Species: T. tokunoshimensis
Binomial name
Tokudaia tokunoshimensis
Endo & Tsuchiya , 2006
Tokudaia tokunoshimensis distribution.png

The Tokunoshima spiny rat (Tokudaia tokunoshimensis) is a rodent found only on the island of Tokunoshima in the Ryukyu Islands of Japan. Due to its small habitat, it is considered endangered. It is commonly found in the secondary and primary subtropical moist broadleaf forests of this island.[1] The karyotype has an odd diploid number, 2n = 45.[2] Like its relative T. osimensis, it is one of the few mammals that lack a Y chromosome and SRY gene.[3]

The species is threatened by deforestation and predation by feral cats and dogs.[1]

See also[edit]


  1. ^ a b c Laginha Pinto Correia, D. (2016). "Tokudaia tokunoshimensis". IUCN Red List of Threatened Species. IUCN. 2016: e.T136695A22409747.en. doi:10.2305/IUCN.UK.2016-1.RLTS.T136695A22409747.en. Retrieved 20 August 2016. 
  2. ^ Musser, G.G.; Carleton, M.D. (2005). "Tokudaia muenninki". In Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 1512–1513. ISBN 978-0-8018-8221-0. OCLC 62265494. 
  3. ^ Kuroiwa A, Handa S, Nishiyama C, Chiba E, Yamada F, Abe S, Matsuda Y (2011-06-08). "Additional copies of CBX2 in the genomes of males of mammals lacking SRY, the Amami spiny rat (Tokudaia osimensis) and the Tokunoshima spiny rat (Tokudaia tokunoshimensis)". Chromosome Res. 19: 635–44. doi:10.1007/s10577-011-9223-6. PMID 21656076.