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古亚洲象.
古亚洲象![](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Infobox_info_icon2.svg/18px-Infobox_info_icon2.svg.png)
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化石
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科学分类
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界:
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动物界 Animalia
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门:
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脊索动物门 Chordata
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纲:
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哺乳纲 Mammalia
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目:
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长鼻目 Proboscidea
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科:
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象科 Elephantidae
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属:
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象属 Elephas
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种:
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古亚洲象 E. hysudricus
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二名法
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Elephas hysudricus
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异名
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Hypselephas hysudricus
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古亚洲象(学名:Elephas hysudricus)是一种已灭绝的象科动物,化石发现于西瓦利克山脉。生活在上新世和更新世时期[1]。
化石最早在印度博尔德下更新世砾岩带的侵蚀沉积而成。同地层也发现华丽剑齿象(Stegodon ganesha)、双角犀(Dicerorhinus platyrhinus)、印度马 (Equus sivalensis) 和印度骆驼 (Camel sivalensis)等。
古亚洲象的颅骨与非洲菱齿象的颅骨大不相同。它们的臼齿相对较短,较类似于东印度和日本古菱齿象的某些种类。 Falconer 和 Cautley以及 Osborn曾描绘此种古亚洲象幼年颅骨有极大的头颅指数(颅宽*100/颅长),与Blainville 描绘的 Elephas indicus 的幼年颅骨非常相似。 这些高而压缩的颅骨与非洲菱齿象低而扁平的幼年颅骨大不相同。 在咀嚼面可观察到不明显的中尖突(loxodont-sinus)[2]
参考文献
- ^ Nanda, A. C. Upper Siwalik mammalian faunas of India and associated events. Journal of Asian Earth Sciences. 2002, 21 (1): 47–58. doi:10.1016/S1367-9120(02)00013-5.
- ^ Proboscidea : a monograph of the discovery, evolution, migration and extinction of the mastodonts and elephants of the world(II)p.1340 By Osborn, Henry Fairfield, 1857-1935.
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