michael booth. first appeared in the late cretaceous (84 mya) worldwide 3 families 8 genera 23...
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Teeth can be replaced one after another but will slow with age
Dermal Pressure Receptors can detect slightest disturbances on surface of water allows them to detect prey, danger, and intruders even in total darkness.
Skin is comprised of non-overlapping scales that are shed individually
Small plates of bone called osteoderms have annual growth rings and can be counted to approximate age
A secondary bony plat enables them to breath while partially submerged even if mouth is full of water
Gender is not controlled by genetics but rather incubation temperature.
2 out of the 23 species are native to North AmericaAlligator mississippiensis (American Alligator)Crocodylus acutus (American Crocodile)
Located mainly in the southeastern states