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 Introduction

LEPOSPONDYLI

EUREPTILIA

SYNAPSIDA

PARAREPTILIA

DIADECTOMORPHA

ANTHRACOSAUROIDEA

TEMNOSPONDYLI

UNIDENTIFIED TETRAPODS

Stratigraphic chart of the lower Permian (partial)

Phylogenetic Relationships

Content updated October 16, 2005

AUTUN SEYMOURIAMORPH

Anthracosauroidea-Seymouriamorpha

Above, picture of  a Seymouriamorph  skeleton. From Autun, France. Lower Permian.