Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
SCLEROCEPHALUS
Temnospondyli-Archegosauroidea-Actinodontidae
Above: enlarged picture of the skull of the same skeleton.
Abbreviations: a, angular; d, dentary; f, frontal; m, maxilla; n, nasal; pf, postfrontal; pm, premaxilla; prf, prefrontal; sa, surangular.