Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
CAPTORHINUS MAGNUS
Eureptilia-Captorhinidae
Above : picture of an Intermedium of Captorhinus Magnus, showing the sutural surfaces with Tibiale (tibss) and proximal centrale (pcss), confirming the fact that the astragalus of Captorhinus is a composite structure formed through the fusion of three ossifications, the intermedium, the tibiale and the proximal centrale. From Richards Spur (Dolese Quarry) - Comanche Co. Oklahoma
Abbreviations: pcss, sutural surface for proximal centrale; tibss, sutural surface for tibiale