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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

 

ARCHERIA

Anthracosauroidea-Embolomeri

References

 

 

Above: pictures of Archeria pleurocentrum and neural arch in anterior and lateral view.  From  Ryan Sandstone, Wellington Formation, near Waurika. Jefferson Co. Oklahoma