豪猪亚目

豪猪亚目
化石时期：始新世至现代
水豚 Hydrochoerus hydrochaeris
科学分类 编辑
界： 动物界 Animalia
门： 脊索动物门 Chordata
纲： 哺乳纲 Mammalia
目： 啮齿目 Rodentia
亚目： 豪猪亚目 Hystricomorpha
Brandt, 1855
下目

豪猪亚目（学名：Hystricomorpha）在历史上曾有过许多含义。广义上是指所有具有豪猪型颧弓－咬肌结构（Zygomasseteric system）的啮齿目动物（跳鼠类除外），包括豪猪下目（Hystricognathi）、栉趾鼠科（Ctenodactylidae）、鳞尾松鼠科（Anomaluridae）、跳兔科（Pedetidae）。分子及形态学研究表明，将鳞尾松鼠科与跳兔科列入其中是有争议的。根据Carleton与Musser的研究[1]，这两科被分为鳞尾松鼠亚目（Anomaluromorpha）。

豪猪亚目（又被称为Entodacrya或Ctenohystrica）的现代定义是指将栉趾鼠与豪猪下目联系起来的分类学假设。[1]支持这一说法有很多形态学以及分子系统发生学的证据。如果此假说是真实的，那传统观点中的松鼠形亚目将被推翻，成为一个并系群。

豪猪类动物，或至少是豚鼠小目中的成员，有时会被认为是非啮齿类。[2][3][4]不过大多数分子与遗传学研究都表明啮齿动物是单系群。[5][6][7][8][9][10]而支持啮齿类为多系群的证据被认为是源自长枝吸引（long branch attraction）的现象。[11]

豪猪类动物于渐新世早期出现于南美洲[12]，这里此前的陆地哺乳动物只有后兽下纲、贫齿总目、南蹄目。豪猪类是从非洲横渡大西洋到达南美洲的。同一类型的迁徙还发生在灵长目中，这些都发生于南北美洲生物大迁徙之前。不过这些说法至今尚存争议。

分类

以下的分类是根据Marivaux等人对早期啮齿类化石进行的支序分类学分析而来的。[13][14]他们的研究支持豪猪亚目假说，并表明McKenna与Bell定义的先松鼠亚目（Sciuravida）[15]是多系群，因而并不成立。

参考文献

维基共享资源上的相关多媒体资源：豪猪亚目
維基物種上的相關信息：豪猪亚目
  1. ^ 1.0 1.1 Carleton and Musser, 2005
  2. ^ Graur et al., 1991
  3. ^ D'Erchia et al., 1996
  4. ^ Reyes et al., 2000
  5. ^ Cao et al., 1994
  6. ^ Kuma and Miyata, 1994
  7. ^ Sullivan and Swofford, 1997
  8. ^ Robinson-Rechavi et al., 2000
  9. ^ Lin et al., 2002
  10. ^ Reyes et al., 2004
  11. ^ Bergsten, 2005
  12. ^ Flynn et al., 2003
  13. ^ Marivaux et al., 2002
  14. ^ Marivaux et al., 2004
  15. ^ McKenna and Bell, 1997
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  • Carleton, M. D. and G. G. Musser. 2005. Order Rodentia. Pp745–752 in Mammal Species of the World A Taxonomic and Geographic Reference (D. E. Wilson and D. M. Reeder eds.). Baltimore, Johns Hopkins University Press.
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