Mammals. Lindsey Riehl, Renee Reazor, Maura Sprecher. Mammals. Mammals are one of the 6 main classes of animals There are about 4500 species of mammals They were found to have evolved from reptiles called synapsids 275-310 million years ago Mammal comes from the Latin word “mamma”.
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Lindsey Riehl, Renee Reazor, Maura Sprecher