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: CENTROCRYPTODIRA GAFFNEY & MEYLAN, 1988

ORDER: POLYCRPTODIRA GAFFNEY & MEYLAN, 1988

SUBORDER: PROCOELOCRYPTODIRA GAFFNEY & MEYLAN, 1988

INFRAORDER: CHELONOIDEA GAFFNEY & MEYLAN, 1988

Superfamily: DERMOCHELYOIDEA Willams, 1950

Family: TOXOCHELYIDAE Baur, 1895

Subfamily: LOPHOCHELYINAE Zangerl, 1953

Peritresius ornatus
= Chelone ornata

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

Superfamily: CRYPTOCLEIDOIDEA Williston, 1925

TRICLEDIA O’KEEFE , 2001

Family: CIMOLIASAURIDAE Delair, 1959

Cimoliasaurus magnus

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT: AVEMETATARSALIA BENTON, 1999

COHORT: PROLACERTIFORMES CAMP, 1945 NOVA

SUPERORDER: TAPINOPLATIA PETERS, 2000

GRANDORDER: CHARACIOPODA PETERS, 2000

MICRORDER: FENESTRASAURIA PETERS, 2000

ORDER: PTEROSAURIA KAUP, 1834

SUBORDER: EUPTERODACTYLOIDEA BENNETT, 1994

Superfamily: AZHDARCHIDEA Nesov, 1984

Family: AZHDARCHIDAE Nesov, 1984 emend Padian, 1986

Azhdarcho sp