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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