Authors
Shawn P Zack, Tonya A Penkrot, Jonathan I Bloch, Kenneth D Rose
Publication date
2005/3/24
Journal
Nature
Volume
434
Issue
7032
Pages
497
Publisher
Nature Publishing Group
Description
Macroscelideans (elephant shrews or sengis) are small-bodied (25–540 g), cursorial (running) and saltatorial (jumping), insectivorous and omnivorous placental mammals represented by at least 15 extant African species classified in four genera. Macroscelidea is one of several morphologically diverse but predominantly African placental orders classified in the superorder Afrotheria by molecular phylogeneticists,. The distribution of modern afrotheres, in combination with a basal position for Afrotheria within Placentalia and molecular divergence-time estimates, has been used to link placental diversification with the mid-Cretaceous separation of South America and Africa. Morphological phylogenetic analyses do not support Afrotheria,, and the fossil record favours a northern origin of Placentalia. Here we describe fossil postcrania that provide evidence for a close relationship between North American Palaeocene …
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