SOUTHEASTERN COLORADO
OTERO COUNTY
COMANACHE NATIONAL GRASSLANDS
UPPER PORTION OF JUANA LOPEZ MEMBER
PRIONOCYCLUS WYOMINGENSIS AND SCAPHITES WHITFIELD ZONES
CARLILE SHALE
LATEST MIDDLE TURONIAN STAGE
LATE GALLIC SUPEPOCH
EARLY GULF EPOCH
MIDDLE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1904
INFRACLASS: EURYAPSIDA COLBERT, 1945
SUPERORDER: SAUROPTERYGIA OWEN 1860
GRANDORDER: EOSAUROPTERYGIA emend RIEPPEL, 1994
ORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835
SUBORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835
INFRAORDER: PLESIOSAUROMORPHA NOVA
EUPLESIOSAURIA O’KEEFE, 2001
Superfamily: ELASMOSAUROIDEA Cope, 1869
Family: ELASMOSAURIDAE Cope, 1869
Gen. sp indet.
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SOUTHEASTERN COLORADOOTERO COUNTY
PURGATOIRE RIVER VALLEY
LAST CHANCE QUARRY
MEMBER?
MORRISON FORMATION
ZONE?
COMOBLUFFIAN AGE
KIMMERIDGIAN STAGE
UPPERMOST MALM EPOCH
LATE JURASSIC
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1904
SUPERLEGION: NEODIAPSIDA BENTON, 1985
LEGION: ARCHOSAUROMORPHA HUENE, 1946
SUBLEGION: DINOSAUROMORPHA BENTON & NORMAN IN BENTON, 1985
INFRALEGION: DINOSAURIFORMES NOVAS, 1992
SUPERCOHORT: DINOSAURIA OWEN, 1842
COHORT: ORNITHISCHIFORMES COOPER, 1985
SUPERORDER: SAUROPODOMORPHA HUENE, 1932
GRANDORDER: BRONTOSAURIA OLSHEVSKY, 1991 (emend)
MICRORDER: SAUROPODA MARSH, 1878
Incertae sedis
Gen. Sp indet.
ORDER: EUSAUROPODA
SUBORDER: NEOSAUROPODA BONAPARTE, 1986
Family: CAMARASAURIDAE Cope, 1877
Subfamily: CAMARASAURINAE Cope, 1877 (sensu Nopcsa, 1928)
Camarasaurus sp
INFRAORDER: HOMALOSAUROPIA JANENSCH, 1929
PARVORDER: DIPLODOCIMORPHA CALVO & SALGADO, 1995
Superfamily: DIPLODOCOIDEA Marsh, 1884 (sensu Upchurch, 1995)
Family: DIPLODOCIDAE Marsh, 1884
Apatosaurus sp
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