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.

Fossil shows how early mammals swallowed like their descendants - UChicago Medicine

From jaws to ears - Understanding Evolution

Resolving the evolution of the mammalian middle ear using Bayesian inference, Frontiers in Zoology

Rebecca Hawkins on X: Mammal ancestors once had many bones in their #jaws like lizards, but now modern mammals only have one bone, the dentary. What happened to the rest? Research shows

In the developing ears of opossums, echoes of evolutionary history

Transient role of the middle ear as a lower jaw support across mammals

Jaws to ears in the ancestors of mammals - Understanding Evolution

Evolution of our mammalian ancestor's ear bone

Mammalian Evolution and Triassic Cynodonts