5) Temporal Bone

Ice Cream Cone

Ice Cream- Head of Malleus

Cone- Body and short process of incus

Q: What bony feature distinguishes mammals from lower vertebrates?

A: Mammals have three middle ear bones

References:

American Museum of Natural History (AMNH) website

Latest new on this topic

http://www.amnh.org/science/papers/fossil_2011.php