Skip to Main Content
Skip Nav Destination

The mammalian stapes is the subject of considerable investigation, but ambiguity remains with respect to the primitive condition in higher-level mammal clades and the pattern of subsequent modifications. We question the widely held belief that the strongly bicrurate, stirrup-like stapes represents the ancestral mammalian and therian state (Goodrich, 1930). The primitive stapes in the common ancestor of mammals and therapsids was probably columelliform and had a stapedial foramen for the passage of the stapedial artery. However, additional modifications are required to produce the bicrurate structure characteristic of many eutherians. Moreover, distributional evidence does not rule out the possibility that...

You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Figures & Tables

Contents

GeoRef

References

Related

Citing Books via

Close Modal

or Create an Account

Close Modal
Close Modal