Evolution of our mammalian ancestor's ear bone

It has long been believed that the hearing bone called stapes, one of the smallest bones in ancestor of mammals, shows no differences between species.

In the news–whale ancestors, and more ear bones

Evolutionary developmental biology of the mammalian middle ear: using virtual reconstruction to integrate development and biomechanics - The Hermon Slade Foundation

Hypothesized scenario of the TM and middle ear evolution in amniotes.

Jaws to ears in the ancestors of mammals - Understanding Evolution

Ruminant inner ear shape records 35 million years of neutral evolution

Chinese and American paleontologists discover

Quadroarticular vs Dentary-Squamosal jaw

Dinosaurs are not us': book reveals how mammals came to rule the world, Palaeontology

The Evolutionary Break That Gave Mammals Their Hearing - The Atlantic

Eat and listen—how chewing and hearing evolved