Supriya Ghosh (Editor)

Spalacidae

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Kingdom  Animalia
Order  Rodentia
Scientific name  Spalacidae
Rank  Family
Phylum  Chordata
Superfamily  Muroidea
Higher classification  Muroidea
Spalacidae peoplewkueducharlessmithfaunmapsm084spaljpg
Lower classifications  Spalax, Tachyoryctes, Bamboo rat, Rhizomys, Big‑headed mole‑rat

Rhizomys is a genus of rodents in the family 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 southeastern Europe. It includes the blind mole-rats, bamboo rats, mole-rats, and zokors. This family represents the oldest split (excluding perhaps the Platacanthomyinae) in the muroid superfamily, and comprises animals adapted to a subterranean way of life. These rodents were thought to have evolved adaptations to living underground independently until recent genetic studies demonstrated they form a monophyletic group. Members of the Spalacidae are often placed in the family Muridae along with all other members of the Muroidea.

Contents

Spalacidae Spalacidae Wikiwand

Characteristics

Spalacidae Rodentia amp Lagomorpha Zoology 4480 with Worthy at University of

Spalacids are mouse- to rat-sized rodents, adapted to burrowing and living underground. They have short limbs, wedge-shaped skulls, strong neck muscles, large incisor teeth, and small eyes and external ears. In the zokors, which dig primarily with their feet, rather than their teeth, the front claws are also massively enlarged. These features are least extreme in the bamboo rats, which spend at least some of their time above ground, foraging for food. They are most highly developed in the blind mole-rats, whose eyes are completely covered by skin, and entirely lack external ears or tails.

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All of the spalacid species dig extensive underground burrows, which may include storage chambers for food, latrine chambers, and breeding nests. They are generally solitary animals, and do not share their tunnel complexes with other individuals. All the species are herbivores, feeding on roots, bulbs, and tubers.

Spalacidae Spalacidae Wikipedia

They give birth to litters of up to six young after a gestation period between three and seven weeks, depending on the species. As with many other muroids, the young are born blind, hairless, and helpless. They may stay with the mother for several months before setting off to establish their own burrows, although some species disperse as soon as they are weaned.

Characteristics

Spalacidae Spalacidae Wikipedia

Norris et al. listed several characteristics present in all members of this family which distinguish them from the rest of the muroids, (the clade Eumuroida). These are "the reduction or absence of external eyes, reduced pinnae, stocky body, short tail (<50% head and body length), broad rostrum, triangular-shaped braincase, infraorbital canal ovoid shape and does not extend ventrally to the roof of the palate, zygomatic plate absent or much reduced, nasolacrimal canal inside infraorbital canal, incisive foramina small to medium-sized, extensive neck musculature and prominent points of attachment on the occipitum, minimal reduction in M3 relative to M1 and M2, and a distinct orientation of the manubrium of the malleus bone."

Classification

The spalacids are classified in three subfamilies, six genera, and 37 species.

FAMILY SPALACIDAE

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  • Subfamily Myospalacinae - zokors
  • Genus Myospalax
  • Myospalax myospalax species group
  • False zokor, M. aspalax
  • Siberian zokor, M. myospalax
  • Myospalax psilurus species group
  • Transbaikal zokor, M. psilurus
  • Genus Eospalax
  • Chinese zokor, E. fontanierii
  • Rothschild's zokor, E. rothschildi
  • Smith's zokor, E. smithii
  • Subfamily Rhizomyinae
  • Tribe Rhizomyini - bamboo rats
  • Genus Rhizomys
  • Hoary bamboo rat, R. pruinosus
  • Chinese bamboo rat, R. sinensis
  • Large bamboo rat, R. sumatrensis
  • Genus Cannomys
  • Lesser bamboo rat, C. badius
  • †Genus Brachyrhizomys (Miocene to Pleistocene)
  • Tribe Tachyoryctini
  • Genus Tachyoryctes - mole-rats
  • Ankole mole-rat, T. ankoliae
  • Mianzini mole-rat, T. annectens
  • Audacious mole-rat, T. audax
  • Demon mole-rat, T. daemon
  • Kenyan African mole-rat, T. ibeanus
  • Big-headed mole-rat, T. macrocephalus
  • Naivasha mole-rat, Tachyoryctes naivashae
  • King mole-rat, T. rex
  • Ruanda mole-rat, T. ruandae
  • Rudd's mole-rat, T. ruddi
  • Embi mole-rat, T. spalacinus
  • East African mole-rat, T. splendens
  • Storey's African mole rat, T. storeyi
  • Subfamily Spalacinae
  • Genus Spalax - blind mole-rats
  • Sandy mole-rat, S. arenarius
  • Mount Carmel blind mole-rat, S. carmeli
  • Middle East blind mole-rat, S. ehrenbergi or Nannospalax ehrenbergi
  • Upper Galilee Mountains blind mole-rat, S. galili
  • Giant mole-rat, S. giganteus
  • Golan Heights blind mole-rat, S. golani
  • Balkan mole-rat, S. graecus
  • Judean Mountains blind mole-rat, S. judaei
  • Lesser mole-rat, S. leucodon
  • Greater mole-rat, S. microphthalmus
  • Munzur mole-rat, S. munzuri
  • Nehring's blind mole-rat, S. nehringi
  • Kazakhstan blind mole-rat, S. uralensis
  • Podolsk mole-rat, S. zemni
  • References

    Spalacidae Wikipedia


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