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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

DISCOSAURISCUS AUSTRIACUS

Anthracosauroidea-Seymouriamorpha

Above, picture of Discosauriscus skeleton. From Boskovice, Czech Republic. Lower Permian.