ARGENTINA
PATAGONIA
SOUTHWESTERN SANTA CRUZ PROVINCE
NEAR THE TOWN OF TRES LAGOS AND THE "PARADOR LA LEONA" (LB SECTION)
EAST OF LAKE VIEDMA
ESTANCIA LA BLANCA
MATA AMARILLA FORMATION
CENOMANIAN STAGE
UPPERMIDDLE GALLIC SUBEPOCH
LOWERMOST GULF EPOCH
MIDDLE CRETACEOUS-SANTONIAN STAGE
SENONIAN SUBEPOCH
LOWER GULF EPOCH
LATE 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
Incertae sedis
Gen. sp indet (Level 1, 2)
SUBORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835
INFRAORDER: PLESIOSAUROMORPHA NOVA
EUPLESIOSAURIA O’KEEFE, 2001
Superfamily: ELASMOSAUROIDEA Cope, 1869
Family: ELASMOSAURIDAE Cope, 1869
Incertae sedis
Gen. sp. indet. (Level 2)
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ARGENTINA
PATAGONIA
SOUTHWESTERN SANTA CRUZ PROVINCE
TYPE LOCALITY OF MATA AMARILLA FORMATION
MATA AMARILLA FORMATION
CENOMANIAN STAGE
UPPERMIDDLE GALLIC SUBEPOCH
LOWERMOST GULF EPOCH
MIDDLE CRETACEOUS-SANTONIAN STAGE
SENONIAN SUBEPOCH
LOWER GULF EPOCH
LATE 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
Incertae sedis
Gen. sp indet
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