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
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