Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
AUTUN SEYMOURIAMORPH
Anthracosauroidea-Seymouriamorpha
Above, picture of the anterior dorsal vertebrae of the same seymouriamorph skeleton. From Autun, France. Lower Permian.
Abbreviations: AZ, anterior zygapophyses; NS, neural spine; PZ, posterior zygapophyses; R, rib;