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Early rhinocerotids (Mammalia: Perissodactyla) from South Asia and a review of the Holarctic Paleogene rhinocerotid record

机译:来自南亚的早期鼻犀科动物(哺乳动物:Perissodactyla)和古生代古猿基因鼻犀科动物记录的回顾

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摘要

The earliest rhinocerotids from South Asia are identified on the basis of few dental remains originating from the Late Eocene of Thailand (Wai Lek mine, Krabi Basin) and the Early Oligocene of Pakistan (Paali nala C2, Bugti Hills). Once synthesized, the Holarctic Paleogene rhinocerotid record points out a westward diachronism of rhinocerotid First Appearance Data, from North America to Europe via Asia, throughout mid-Cenozoic times. The faunal similarity among mammal localities from the Late Eocene and Early Oligocene of peninsular Thailand, southern China, and Pakistan suggests the existence of a single South Asian paleoprovince during this interval and the persistence of a tropical-subtropical climate. Substantial faunal changes recorded in eastern Balochistan reveal a significant climatic deterioration from the middle part of the Oligocene. Neither provinciality nor endemism is noticeable for rhinocerotoid taxa recognized in the Oligocene of the Indian subcontinent: neither the Himalayas nor the Tibet Plateau was a paleogeographic barrier for large mammals during this interval.
机译:来自南亚的最早的鼻犀动物是根据少量的牙齿残骸而鉴定的,这些牙齿残骸源自泰国的始新世(甲米盆地的Wai Lek矿山)和巴基斯坦的始新世(Paali nala C2,Bugti Hills)。一旦合成,古隆起的古鼻鼻梁记录就指出了整个始新世时期,从北美洲到亚洲,再到亚洲,从亚洲到欧洲,古鼻鼻的首次出现数据是西向历时的。泰国半岛,中国南部和巴基斯坦的始新世晚期和渐新世早期哺乳动物区域之间的动物区系相似性表明,在此间隔内存在一个南亚古省,并持续了热带-亚热带气候。 Bal路支省东部记录到的大量动物区系变化表明,从渐新世中期开始,气候显着恶化。在印度次大陆的渐新世认识到的鼻猴类群,无论是省级还是地方性都没有注意到:在这段时间内,喜马拉雅山脉和青藏高原都不是大型哺乳动物的古地理屏障。

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