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Mammalogy

Modern Mammal Characteristics

TermDefinition
What Lead To The Rapid Diversification and Expansion of Mammals in the Cenozoic Era? Extinction of dinosaurs; Break-up of Pangea
Most Modern Orders Have Been Around Since... Eocene Epoch
Most Modern Families Have Been Around Since... Miocene Epoch
Skeletal Characteristics Enlarged Temporal Opening; Maxillary and palatine bones extended laterally; Two occipital condyles; Limbs beneath body; lost cervical and lumbar ribs; lost thoracic ribs, also smaller; reduced carpal and tarsal bones; three ossicles in middle ear
Dentary Characteristics Enlarged dentary bone; heterodont teeth; dentary-squamosal articulation
Soft Tissue Characteristics Fur; Four chamber heart with left aortic arch; Muscular diaphragm; Mammary glands; Enucleated red blood cells; Corpus callosum (some); Placenta (some); Homeothermy
Created by: LionsandGiants
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