http://en.wikipedia.org/wiki/Mammal
Hadrocodium, whose fossils date from approximately 195 million years ago, in the Early Jurassic, provides the first clear evidence of a jaw joint formed solely by the squamosal and dentary bones; there is no space in the jaw for the articular, a bone involved in the jaws of all early synapsids.
Hadrocodium, whose fossils date from approximately 195 million years ago, in the Early Jurassic, provides the first clear evidence of a jaw joint formed solely by the squamosal and dentary bones; there is no space in the jaw for the articular, a bone involved in the jaws of all early synapsids.
No comments:
Post a Comment