MONTOGOMERY COUNTY
BURKVILLE LOCALITY
MOOREVILLE TONGUE
SELMA FORMATION
MIDDLE TYLOSAURUS ACME-ZONE – CLIDASTES ACME ZONE
NIOBRARIAN AGE
UPPER SANTONIAN-LOWER CAMPANIAN STAGE
SENONIAIN SUBEPOCH
GULF EPOCH
LATE 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: CENTROCRYPTODIRA GAFFNEY & MEYLAN, 1988
ORDER: POLYCRPTODIRA GAFFNEY & MEYLAN, 1988
SUBORDER: PROCOELOCRYPTODIRA GAFFNEY & MEYLAN, 1988
INFRAORDER: CHELONOIDEA GAFFNEY & MEYLAN, 1988
Superfamily: DERMOCHELYOIDEA Willams, 1950
Family: PROTOSTEGIDAE Cope, 1889
Subfamily: PROTOSTEGINAE Cope, 1889
Tribe: CALCARICHELYINI Hooks, 1998
*Calcarichelys gemma
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