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