Mammals
1 Mammals. 2 Evolution and Characteristics Mammals belong to the class Mammalia, which includes 4000 species Most dominant land animals on earth.
Mammalia. Mammal Evolution Mammals are believed to have evolved from Reptiles during the late Jurassic period.
Orders Not Yet Discussed
Orders Not Yet Discussed Cetaceans. These aquatic mammals—whales, dolphins, porpoises, etc.– include the largest animals ever known. Rabbits. These small.
