CANADA

NUNAVUT

ELLESMERE ISLAND

APPROXIMATELY 3 KM AWAY FROM EUREKA WEATHER STATION

REPTILE CREEK

LATE BERRIASIAN TO EARLY VALANGININA STAGE

EARLY TO MIDDL ENEOCOMANIAN SUPEPOCH

EARLY TO MIDDLE EARLY CRETACEOUS EPOCH

EARLY EARLY CRETACEOUS EPOCH

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

NEODIAPSIDA: BENTON, 1985

LEPIDOSAUROMORPHA: BENTON 1985

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

Family: CRYPTOCLEIDAE Williston, 1925

Colymbosaurus sp