Zokor
Encyclopedia
Zokors are Asiatic burrowing rodent
s resembling mole rats. They include two genera, Myospalax and Eospalax
. Zokors are native to much of China
, Kazhakstan, and Siberian Russia
.
Traditionally, zokors were thought to be closely related to either hamster
s (Cricetinae) or vole
s (Arvicolinae
). Recent molecular phylogenetic
studies have demonstrated that zokors are more closely related to blind mole rat
s (Spalacinae)and root and bamboo rat
s (Rhizomyinae
) in the family Spalacidae
. It appears as if one of the first important evolutionary splits
in muroid
rodents is between burrowing forms and non-burrowing forms
.
Unlike the other spalacids
, which primarily use their incisor
s, zokors use their powerful front claws for digging. They have small eyes and no external ears. Zokors feed on plant matter such as tuber
s and seed
s.
Zokor bone is sometimes used as a more environmentally friendly alternative to tiger bone in traditional Chinese medicine. This product is called Sailonggu.
The Myospalacinae contains a single genus
and 7 species.
Rodent
Rodentia is an order of mammals also known as rodents, characterised by two continuously growing incisors in the upper and lower jaws which must be kept short by gnawing....
s resembling mole rats. They include two genera, Myospalax and Eospalax
Eospalax
Eospalax is a genus of rodent in the Spalacidae family. It contains the following species:*Chinese Zokor, Eospalax fontanierii*Rothschild's Zokor, Eospalax rothschildi*Smith's Zokor, Eospalax smithii...
. Zokors are native to much of China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
, Kazhakstan, and Siberian Russia
Siberia
Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...
.
Traditionally, zokors were thought to be closely related to either hamster
Hamster
Hamsters are rodents belonging to the subfamily Cricetinae. The subfamily contains about 25 species, classified in six or seven genera....
s (Cricetinae) or vole
Vole
A vole is a small rodent resembling a mouse but with a stouter body, a shorter hairy tail, a slightly rounder head, smaller ears and eyes, and differently formed molars . There are approximately 155 species of voles. They are sometimes known as meadow mice or field mice in North America...
s (Arvicolinae
Arvicolinae
The Arvicolinae are a subfamily of rodents that includes the voles, lemmings, and muskrats. They are most closely related to the other subfamilies in the Cricetidae . Some authorities place the subfamily Arvicolinae in the family Muridae along with all other members of the superfamily Muroidea...
). Recent molecular phylogenetic
Molecular phylogeny
Molecular phylogenetics is the analysis of hereditary molecular differences, mainly in DNA sequences, to gain information on an organism's evolutionary relationships. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree...
studies have demonstrated that zokors are more closely related to blind mole rat
Blind mole rat
The genus Spalax contains the blind, fossorial, or subterranean mole rats, which are one of several types of rodents that are called mole rats. The hystricognath mole rats of the family Bathyergidae are completely unrelated, but some other forms are also in the family Spalacidae...
s (Spalacinae)and root and bamboo rat
Bamboo rat
The bamboo rats are four species of rodents of the subfamily Rhizomyinae. They are the sole living representatives of the tribe Rhizomyini. All are found in the eastern half of Asia.The species are:...
s (Rhizomyinae
Rhizomyinae
The subfamily Rhizomyinae of rodents includes the Asian bamboo rats and certain of the African mole rats. The subfamily is grouped with the Spalacinae and the Myospalacinae into a family of fossorial muroid rodents basal to the other Muroidea....
) in the family Spalacidae
Spalacidae
The Spalacidae, or spalacids are a family of rodents in the large and complex superfamily Muroidea. They are native to eastern Asia, the Horn of Africa, the Middle East, and south-eastern Europe. It includes the blind mole rats, bamboo rats, root rats, and zokors...
. It appears as if one of the first important evolutionary splits
Cladogenesis
Cladogenesis is an evolutionary splitting event in a species in which each branch and its smaller branches forms a "clade", an evolutionary mechanism and a process of adaptive evolution that leads to the development of a greater variety of sister species...
in muroid
Muroidea
Muroidea is a large superfamily of rodents. It includes hamsters, gerbils, true mice and rats, and many other relatives. They occupy a vast variety of habitats on every continent except Antarctica. Some authorities have placed all members of this group into a single family, Muridae, due to...
rodents is between burrowing forms and non-burrowing forms
Eumuroida
Eumuroida is a clade defined in 2004 to describe a group of muroid rodents. The clade is not defined in the standard taxonomic hierarchy, but it is between superfamily and family....
.
Unlike the other spalacids
Spalacidae
The Spalacidae, or spalacids are a family of rodents in the large and complex superfamily Muroidea. They are native to eastern Asia, the Horn of Africa, the Middle East, and south-eastern Europe. It includes the blind mole rats, bamboo rats, root rats, and zokors...
, which primarily use their incisor
Incisor
Incisors are the first kind of tooth in heterodont mammals. They are located in the premaxilla above and mandible below.-Function:...
s, zokors use their powerful front claws for digging. They have small eyes and no external ears. Zokors feed on plant matter such as tuber
Tuber
Tubers are various types of modified plant structures that are enlarged to store nutrients. They are used by plants to survive the winter or dry months and provide energy and nutrients for regrowth during the next growing season and they are a means of asexual reproduction...
s and seed
Seed
A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...
s.
Zokor bone is sometimes used as a more environmentally friendly alternative to tiger bone in traditional Chinese medicine. This product is called Sailonggu.
The Myospalacinae contains a single genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
and 7 species.
Taxonomy
Subfamily Myospalacinae- Genus Myospalax
- Myospalax myospalax species group
- False ZokorFalse ZokorThe False Zokor is a species of rodent in the Spalacidae family. It is found in China and Russia.-References:* Shar, S. & Lkhagvasuren, D. 2008. . Downloaded on 14 August 2008....
, Myospalax aspalax - Siberian ZokorSiberian ZokorThe Siberian Zokor is a species of rodent in the Spalacidae family. It is found in Kazakhstan and Russia.-References:* Tsytsulina, K. 2008. . Downloaded on 16 August 2009....
, Myospalax myospalax
- False Zokor
- Myospalax psilurus species group
- Transbaikal ZokorTransbaikal ZokorThe Transbaikal Zokor is a species of rodent in the Spalacidae family. It is found in China, Mongolia, and Russia.-References:* Shar, S., Tsytsulina, K. & Lkhagvasuren, D. 2008. . Downloaded on 16 August 2009....
, Myospalax psilurus
- Transbaikal Zokor
- Myospalax myospalax species group
- Genus EospalaxEospalaxEospalax is a genus of rodent in the Spalacidae family. It contains the following species:*Chinese Zokor, Eospalax fontanierii*Rothschild's Zokor, Eospalax rothschildi*Smith's Zokor, Eospalax smithii...
- Chinese ZokorChinese ZokorThe Chinese Zokor is a species of rodent in the Spalacidae family. It is endemic to China.-References:* Smith, A.T. & Johnston, C.H. 2008. . Downloaded on 14 August 2009....
, Eospalax fontanierii - Rothschild's ZokorRothschild's ZokorThe Rothschild's Zokor is a species of rodent in the Spalacidae family. It is endemic to China.-References:* Smith, A.T. & Johnston, C.H. 2008. . Downloaded on 14 August 2009....
, Eospalax rothschildi - Smith's ZokorSmith's ZokorSmith's Zokor is a species of rodent in the Spalacidae family. It is endemic to China.-References:* Smith, A.T. & Johnston, C.H. 2008. . Downloaded on 14 August 2009....
, Eospalax smithii
- Chinese Zokor