SHANNON COUNTY
PIERRE FORMATION
UPPER CAMPANIAN STAGE
SENONIAN SUBEPOCH
UPPER 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: PROTOSTEGINI Cope, 1889 (sensu Hooks, 1998)
Subtribe: PROTOSTEGINA Cope, 1889 (sensu Hooks, 1998)
Archelon nova?
SOUTH DAKOTA
SHANNON COUNTY
PINE RIDGE INDIAN RESERVATIONS
EAST BANK OF THE CHEYENNE RIVER
PIERRE FORMATION
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: PROTOSTEGINI Cope, 1889 (sensu Hooks, 1998)
Subtribe: PROTOSTEGINA Cope, 1889 (sensu Hooks, 1998)
Archelon ischyros
= Protostega ischyros
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SOUTH DAKOTA
SHANNON COUNTY
BADLANDS NATIONAL PARK
½ M S OF SAGE CREEK PRIMITIVE CAMPGROUND
NORTH UNIT
VERENDRYE MEMBER
PIERRE SHALE
BACULITES CUNEATUS BIOZONE
UPPER CAMPANIAN STAGE
SENONIAN SUBEPOCH
UPPER GULF EPOCH
LATE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
____________________________________________________________________________________SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1903
INFRACLASS: NEODIAPSIDA BENTON, 1985
LEGION: LEPIDOSAUROMORPHA BENTON, 1983
SUBLEGION: LEPIDOSAURIA HAECKEL, 1866 (DUMERIL & BIBRON, 1839)
MAGNORDER: SQUAMATA, OPPEL, 1811
SUPERORDER: LACERTILIA OWEN, 1842
GRANDORDER: SCINCOGEKKONOMORPHA SUKHANOV, 1961
MICRORDER: SCINCOMORPHA CAMP, 1923
ORDER: ANGUIMORPHA FURBRINGER, 1900
SUBORDER: DIPLOGLOSSA COPE, 1864
INFRAORDER: THECAGLOSSA COPE, 1890
PARVORDER: MONSTERSAURIA NORELL & GAO, 1977
Superfamily: VARANOIDEA Gray, 1827 (sensu Camp, 1923)
Family: MOSASAURIDAE Gervais, 1853
Infrafamily: NATANIA
Subfamily: MOSASAURINAE Gervais, 1853 (sensu Williston, 1897)
Tribe: MOSASAURINI Gervais, 1853 (sensu Russell, 1967)
Mosasaurus lemonnieri
= Mosasaurus conodon
= Clidastes conodon
SOUTH DAKOTA
SHANNON COUNTY
BADLANDS NATIONAL PARK
SOUTH OF ROBERT’S PRAIRIE DOG TOWN
NORTH UNIT
FOX HILLS FORMATION
MAASTRICHTIAN STAGE
UPPERMOST SENONIAN SUBEPOCH
GULF EPOCH
LATE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1903
INFRACLASS: NEODIAPSIDA BENTON, 1985
LEGION: LEPIDOSAUROMORPHA BENTON, 1983
SUBLEGION: LEPIDOSAURIA HAECKEL, 1866 (DUMERIL & BIBRON, 1839)
MAGNORDER: SQUAMATA, OPPEL, 1811
SUPERORDER: LACERTILIA OWEN, 1842
GRANDORDER: SCINCOGEKKONOMORPHA SUKHANOV, 1961
MICRORDER: SCINCOMORPHA CAMP, 1923
ORDER: ANGUIMORPHA FURBRINGER, 1900
SUBORDER: DIPLOGLOSSA COPE, 1864
INFRAORDER: THECAGLOSSA COPE, 1890
PARVORDER: MONSTERSAURIA NORELL & GAO, 1977
Superfamily: VARANOIDEA Gray, 1827 (sensu Camp, 1923)
Family: MOSASAURIDAE Gervais, 1853
Infrafamily: NATANIA
Subfamily: MOSASAURINAE Gervais, 1853 (sensu Williston, 1897)
Tribe: MOSASAURINI Gervais, 1853 (sensu Russell, 1967)
Gen sp indet
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SOUTH DAKOTA
SHANNON COUNTY
6 M SW OF CUNY TALBE ON MULE CREEK
VIRGIN CREEK MEMBER
UPPER PIERRE FORMATION
LOWER MAASTRICHTIAN STAGE
UPPERMOST SENONIAN SUBEPOCH
GULF EPOCH
LATE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1903
INFRACLASS: NEODIAPSIDA BENTON, 1985
LEGION: LEPIDOSAUROMORPHA BENTON, 1983
SUBLEGION: LEPIDOSAURIA HAECKEL, 1866 (DUMERIL & BIBRON, 1839)
MAGNORDER: SQUAMATA, OPPEL, 1811
SUPERORDER: LACERTILIA OWEN, 1842
GRANDORDER: SCINCOGEKKONOMORPHA SUKHANOV, 1961
MICRORDER: SCINCOMORPHA CAMP, 1923
ORDER: ANGUIMORPHA FURBRINGER, 1900
SUBORDER: DIPLOGLOSSA COPE, 1864
INFRAORDER: THECAGLOSSA COPE, 1890
PARVORDER: MONSTERSAURIA NORELL & GAO, 1977
Superfamily: VARANOIDEA Gray, 1827 (sensu Camp, 1923)
Family: MOSASAURIDAE Gervais, 1853
Infrafamily: NATANIA
Subfamily: RUSSELLOSAURINAE
Tribe: PLIOPLATECARPINI Dollo, 1884 (sensu Russell, 1967)
Prognathodon overtoni
= undrescribed genus overtoni
= Brachysaurus overtoni
= Ancylocentrum overtoni
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