WYOMING

NATRON COUNTY

QUARRY DUMP

ALCOVA (LIMESTONE) MEMBER

COW MOUNTAIN FORMATION

CHUGWATER GROUP

SPATHIAN STAGE

UPPERMOST SCYTHIAN EPOCH

LATE EARLY TRIASSIC

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: NOTHOSAURIFORMES STORRS, 1991

SUBORDER: EUSAUROPTERYGIA TSCHANZ, 1989

INFRAORDER: PISTOSAUROIDEA BAUR, 1887-90

Superfamily: CYMATOSAURIA HUENE, 1944

Family: CYMATOSAURIDAE Huene, 1948

*Corosaurus alcovensis

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WYOMING

NATRON COUNTY

3 M NE OF FREELAND

ALCOVA (LIMESTONE) MEMBER

COW MOUNTAIN FORMATION

CHUGWATER GROUP

SPATHIAN STAGE

UPPERMOST SCYTHIAN EPOCH

LATE EARLY TRIASSIC

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: NOTHOSAURIFORMES STORRS, 1991

SUBORDER: EUSAUROPTERYGIA TSCHANZ, 1989

INFRAORDER: PISTOSAUROIDEA BAUR, 1887-90

Superfamily: CYMATOSAURIA HUENE, 1944

Family: CYMATOSAURIDAE Huene, 1948

Corosaurus alcovensis

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