A Middle Jurassic mammal from Madagascar
@article{Flynn1999AMJ, title={A Middle Jurassic mammal from Madagascar}, author={J. Flynn and J. M. Parrish and B. Rakotosamimanana and W. F. Simpson and A. Wyss}, journal={Nature}, year={1999}, volume={401}, pages={57-60} }
The lower molars of tribosphenic mammals (marsupials, placentals and their extinct allies) are marked, primitively, by a basined heel (talonid) acting as the mortar to the pestle of a large inner cusp (protocone) on the opposing upper teeth. Here we report the earliest tribosphenic mammal found so far, three lower teeth in a jaw fragment from Middle Jurassic (Bathonian, ∼167 ± 2 Myr) sediments of northwest Madagascar. This specimen extends the stratigraphic range of the Tribosphenida by some 25… CONTINUE READING
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