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粗尾鼠负鼠属
负鼠科的一属哺乳动物 来自维基百科,自由的百科全书
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粗尾鼠负鼠属(Thylamys,[1]白鼠负鼠),哺乳纲的一属,而与鼠负鼠属(白鼠负鼠)同科的动物尚有林负鼠属(安氏负鼠)、短尾负鼠属(短尾负鼠)等之数种哺乳动物。
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形态描述
本属物种的前上颌骨是圆的而不是尖的。雌兽有育幼袋,而且其乳头在腹部排成对称的两排 [2]。除T. macrurus以外,其馀物种皆以其尾部储存脂肪[3],尽管可能这并不适7于所有同属物种[4]。
分类学
现时本属包括下列各现生种:
- Cinderella fat-tailed mouse opossum (T. cinderella)
- (Thylamys citellus) [5]
- Elegant fat-tailed mouse opossum (T. elegans)
- (Thylamys fenestrae) [6]
- Karimi's fat-tailed mouse opossum (T. karimii)
- Paraguayan fat-tailed mouse opossum (T. macrurus) Olfers 1818
- White-bellied fat-tailed mouse opossum (T. pallidior) Thomas 1902
- (T. pulchellus) [7]
- Common fat-tailed mouse opossum (T. pusillus) Desmarest 1804
- Argentine fat-tailed mouse opossum (T. sponsorius)
- Tate's fat-tailed mouse opossum (T. tatei)
- Dwarf fat-tailed mouse opossum (T. velutinus)
- Buff-bellied fat-tailed mouse opossum (T. venustus) Thomas 1902
Fossils belonging to the genus date back to the 中新世, with the oldest specimens being found in the Cerro Azul Formation of 阿根廷 and the Honda Group of 哥伦比亚.[8] Genetic studies indicate that the genus may have originated around 14 million years ago.[9]
Fossil species:[10]
- T. colombianus Goin 1997
- T. minutus Goin 1997
- T. pinei Goin et al. 2000
参考文献
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