TEXAS
CLAY COUNTY
4 MILES SOUTHEAST OF WINDTHORST
PUEBLO FORMATION
CISCO GROUP
LATE PENNSYLVANIAN
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
*Stereophallodon ciscoensis
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