Home page

Contact

 Introduction

LIST OF THE RICHARDS SPUR (FORT SILL)  TETRAPOD PALEOFAUNA

LEPOSPONDYLI

EUREPTILIA

SYNAPSIDA

PARAREPTILIA

DIADECTOMORPHA

ANTHRACOSAUROIDEA

TEMNOSPONDYLI

UNIDENTIFIED TETRAPODS

Stratigraphic chart of the lower Permian (partial)

Phylogenetic Relationships

Content updated January 23, 2006

STEREOSTERNUM TUMIDUM

(Amniote inc.sedis? Basal  Parareptile?

Mesosauridae

References 

Below: pictures of the complete skull, temporal region, and snout of the mesosaurid Stereosternum tumidum. Mesosauridae is generally considered the most basal taxon of the Parareptilia clade. From Irati Formation - Brasil.

1) Stereosternum: skeleton

2) Stereosternum: skull of the same skeleton

2) Stereosternum: temporal region of the same skull

3) Stereosternum: snout of the same skull