OKLAHOMA

COTTON COUNTY

DEEP RED RUN LOCALITY

? LOWER TO MIDDLE WAGGONER RANCH FORMATION (FORMERLY CLYDE FORMATION, UPPER WICHITA GROUP)

UPPER WICHITA GROUP

LAND-VERTEBRATE FAUNACHRON LOWER TO MIDDLE C

LOWER LEONARDIAN STAGE

UPPER ROTLIEGENDES EPOCH

EARLY PERMIAN

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: SYNAPSIDA OSBORN, 1903

ORDER: PELYCOSAURIA COPE, 1878

SUBORDER: EUPELYCOSAURIA KEMP, 1982

INFRAORDER: OPHIACHODONTIA NOVA

Family: OPHIACODONTIDAE Nopsca, 1923

Ophiacodon major

INFRAORDER: DIMETRODONTOMORPHA emend NOPCSA, 1925

Family: SPHENACODONTIDAE Marsh, 1878

Subfamily: SPHENACODONTINAE Marsh, 1878 (sensu Nopcsa, 1925)

Tribe: DIMETERODONTINI Nopcsa, 1925

Dimetrodon macrospondylus
= Clepsydrops macrospondylus
= *Dimetrodon platycentrus
*Dimetrodon dollovianus
= Embolophorus dollovianus
Dimetrodon grandis
= Theropleura grandis
Dimetrodon sp

____________________________________________________________________________________