Images for Chapter 15 The Origin of Mammals
Teeth and jaws
The First Mammals
Hadrocodium, a new Early Jurassic mammal.
Phylogram for advanced mammals. Figure 15.8.
The Tribosphenic Molar
Tribosphenic Teeth Evolved Twice
Marsupials and their ancestors (metatherians)
The oldest metatherian (stem marsupial) yet: from the famous Liaoning beds of north China, early Cretaceous: Sinodelphys.
Three news stories (December 1998) about the discovery of a very early (80 Ma) well-preserved marsupial ancestor from Mongolia, Deltatheridium:
Placentals and their ancestors (eutherians)
Eomaia, the earliest eutherian mammal: another stunning fossil from China
Page last updated January 13, 2005.
Links last checked, August 27, 2004.
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