UTAH
SAN JUAN COUNTY
VALLEY OF THE GODS
BIRTHDAY BONEBED LOCALITY (CM LOCALITY NO. 3345)
HALGAITO FORMATION
LATE PENNSYLVANIAN (LATE CARBONIFEROUS)-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
Incertae sedis
*Shashajaia bermani