WYOMING
NOTE: EXACT LOCALITY INFORMATION HAS BEEN LOST

FREMONT COUNTY

SOUTHEAST OF LANDER

NEAR CONANT CREEK

BASE OF BELLE FOURCHE MEMBER

FRONTIER FORMATION

LATEST ALBIAN STAGE

MIDDLE GALLIC SUBEPOCH

UPPERMOST EARLY CRETACEOUS EPOCH OR EARLIEST CENOMANIAN STAGE

MIDDLE GALLIC SUBEPOCH

LOWERMOST 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: CRYPTOCLEIDOIDEA Williston, 1925

TRICLEDIA O’KEEFE , 2001

Family: POLYCOTYLIDAE Cope, 1869

Polycotylus sp

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