Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
EDAPHOSAURUS
Synapsida-Eupelycosauria-Edaphosauridae
Above: picture of a Edaphosaurus scapulocoracoid in ventral view. From Ryan Sandstone, Wellington Formation, near Waurika - Jefferson Co. Oklahoma. Lower Permian.
Abbreviations: acor, anterior coracoid; fcor, coracoid foramen; glen, glenoid cavity; pcor, posterior coracoid