SWITZERLAND
VALANGINIAN STAGE
MIDDLE NEOCOMIAN SUBEPOCH
LOWER EARLY CRETACEOUS EPOCH
EARLY 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
Family: PLESIOSAURIDAE Gray, 1825
Incertae sedis
non Plesiosaurus, *P. neocomiensis
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SWITZERLAND
CANTON OF VAUD
SAINTE-CROIX
UNKOWN FORMATION
GRAVESA ZONE
POSSIBLY VALANGINIAN STAGE
NEOCOMIAN SUBEPOCH
EARLY CRETACEOUS EPOCH
EARLY CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: CHELONOMORPHA KUHN, 1960
SUPERCOHORT: TESTUDINES LINNAEUS, 1758
COHORT: CASICHELYDIA emend GAFFNEY & MEYLAN, 1988
MAGANORDER: CRYPTODIRA GAFFNEY & MEYLAN, 1988
SUPERORDER: SELMACRYPTODIRA GAFFNEY, HUTCHISON, JENKINS & MEEKR, 1987
GRANDORDER: DAIOCRYPTODIRA GAFFNEY & MEYLAN, 1988
MICRORDER: EUCRYPTODIRA GAFFNEY, 1975
CLADE NAME: THALASSOCHELYDIA ANQUETIN, PUNTENER & JOYCE, 2017
Family: THALASSEMYDIDAE Rutimeyer, 1878
Incerate sedis
*Chelonia valanginensis