VERNON COUNTY
COFFEE CREEK NEAR THE BIG WICHITA
ARROYO FORMATION
LOWER CLEAR FORK GROUP
LAND-VERTEBRATE FAUNACHRON LOWER D
MIDDLE 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: EDAPHOSAURA NOVA
Family: EDAPHOSAURIDAE Cope, 1882
Edaphosaurus pogonias
= *Naosaurus claviger
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TEXAS
VERNON COUNTY
BIG WICHITA RIVER
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: DIMETRODONTOMORPHA emend NOPCSA, 1925
Family: SPHENACODONTIDAE Marsh, 1878
Subfamily: SPHENACODONTINAE Marsh, 1878 (sensu Nopcsa, 1925)
Tribe: DIMETERODONTINI Nopcsa, 1925
Dimetrodon dollovianus
= Embolophorus dollovianus