The Chapa pygmy dormouse or Vietnamese pygmy dormouse (''Typhlomys cinereus chapensis'') is a

rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are na ...

endemic to

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

. It is listed as a critically endangered species. It is often considered a separate

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

, but is now recognized as a

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

of the

Chinese pygmy dormouse The Chinese pygmy dormouse, (''Typhlomys cinereus'') is a species of rodent of the family Platacanthomyidae found in China and Vietnam. Subspecies Musser and Carleton (2005) recognized five subspecies. While the northwest Vietnamese form '' Typ ...

(''T. cinereus'').

References

* Listed as Critically Endangered (CR B1+2 cd v2.3) * Oriental dormice Mammals described in 1932 Taxobox trinomials not recognized by IUCN {{muroid-stub it:Typhlomys chapensis