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来自印度的第一种多瘤齿哺乳动物。

The first multituberculate mammal from India.

作者信息

Parmar Varun, Prasad Guntupalli V R, Kumar Deepak

机构信息

Department of Geology, University of Jammu, Jammu, 180006, India.

出版信息

Naturwissenschaften. 2013 Jun;100(6):515-23. doi: 10.1007/s00114-013-1047-0. Epub 2013 May 5.

Abstract

Mesozoic deposits of the former Gondwanaland are depauperate in early mammals, in general, and multituberculate mammals, in particular. Until now, the oldest multituberculate mammals known from the Gondwanan continents come from the Early Cretaceous of Morocco, NW Africa. Here, we report the presence of a new multituberculate mammal, Indobaatar zofiae gen. et sp. nov., from the Lower/Middle Jurassic Kota Formation, Pranhita-Godavari valley in peninsular India. This is the first record of a multituberculate from the Mesozoic rocks of India and possibly predates the oldest known multituberculates from Gondwanan continents. The new specimen, representing an upper premolar (P(4)), compares well with the upper premolar morphology of Eobaatariinae multituberculates known from the Early Cretaceous of Mongolia, China, England, and Spain. Together with the recent findings of cimolodontan multituberculates from the Early Cretaceous of Australia and Late Cretaceous of South America, the new discovery indicates a wide temporal and spatial distribution for multituberculate mammals in the former Gondwanaland.

摘要

总体而言,前冈瓦纳大陆的中生代沉积物中早期哺乳动物较少,尤其是多瘤齿兽类哺乳动物。到目前为止,已知来自冈瓦纳大陆的最古老的多瘤齿兽类哺乳动物来自非洲西北部摩洛哥的早白垩世。在此,我们报告在印度半岛普拉尼塔 - 戈达瓦里河谷的下/中侏罗统科塔组发现了一种新的多瘤齿兽类哺乳动物,佐菲亚印度巴塔兽(Indobaatar zofiae)属及种为新属新种。这是印度中生代岩石中多瘤齿兽类的首次记录,可能早于已知来自冈瓦纳大陆的最古老的多瘤齿兽类。新标本为一枚上前臼齿(P(4)),与已知来自蒙古、中国、英国和西班牙早白垩世的始巴塔兽亚科多瘤齿兽类的上前臼齿形态非常相似。连同最近在澳大利亚早白垩世和南美洲晚白垩世发现的楔齿兽类多瘤齿兽,这一新发现表明多瘤齿兽类哺乳动物在前冈瓦纳大陆有着广泛的时间和空间分布。

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