1 Mammals. 2 Class Mammalia Includes 4000 species Most dominant land animals on earth. Two identifying characteristics: Hair/fur Mammary glands which.
Metatheria: Marsupial Mammals First fossils are from Asia (Lauraisa) ~ 125 MYA. Complex biogeography, related to the formation and rupture of Gondwanaland.
Mammalian Classification
First evolved in Asia or North America ( ‘ Lauraisa ’ , ~ 125 MYA)
