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2014年8月21日 Nature
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John Sibbick’s painting imagines the iconic Early Jurassic basal mammals, Morganucodon and Kuehneotherium, hunting their favoured prey on the small island that they shared in what is now Glamorgan, southern Wales. The very earliest mammals, living in the Late Triassic and Early Jurassic around 200 million years ago, were small and are often presumed to have been generalized insectivores. Now a close study of Morganucodon and Kuehneotherium shows that niche partitioning and dietary specialization were well under way even at that early date. Analysis of tooth wear and jaw biomechanics shows that whereas Morganucodon had powerful jaws, capable of crushing hard prey such as beetles, Kuehneotherium was adapted for snapping at softer prey, such as the scorpion flies illustrated here. Cover: www.johnsibbick.com
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发表于 2014-8-26 23:29
发表于 2014-9-1 17:08
