COMANCHE COUNTY
NEAR FORT SILL
LOWER ARROYO FORMATION
EARLY PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: PARAREPTILIA OLSON 1947
INFRACLASS: SAUROPSIDA HUXLEY, 1864
SUPERORDER: EUREPTILIA OLSON, 1947
ORDER: CAPTORHINOMORPHA WATSON, 1917
SUBORDER: CAPTORHINOMORPHA WATSON, 1917
Family: PROTORTHYRIDIDAE Price, 1937
Gen. sp indet.
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