JACKSON COUNTY
JACKSON QUARRY
PORTLAND
DUNKARD FORMATION
PERMO-CARBONIFEROUS
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 sp
INFRAORDER: EDAPHOSAURA NOVA
Family: EDAPHOSAURIDAE Cope, 1882
Edaphosaurus cruciger
= Dimetrodon cruciger
= Naosaurus cruciger