NORTH DAKOTA

BILLINGS COUNTY

1 M N OF WANNAGAN CREEK QUARRY

BULLION CREEK (TONGUE RIVER) FORMATIONI

LATE PALEOCENE EPOCH

EARLY PALEOGENE

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT CHORISTODERA NOVA

ORDER: CHORISTODERA COPE, 1876

Family: CHAMPSOSAURIDAE Cope, 1884

Champsosaurus gigas

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NORTH DAKOTA

BILLINGS COUNTY

BULLION CREEK FORMATION

LATE TIFFANIAN

LATE PALEOCENE EPOCH

EARLY PALEOGENE

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT CHORISTODERA NOVA

ORDER: CHORISTODERA COPE, 1876

Family: CHAMPSOSAURIDAE Cope, 1884

*Champsosaurus tenuis

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NORTH DAKOTA

BILLINGS COUNTY

SMM WANNAGAN CR QUARRY

BULLION CREEK FORMATION

PALEOCENE EPOCH

LOWER PALEOGENE PERIOD

LOWER TERTIARY SUBERA

CENOZOIC ERA

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT: CRUROTARSI SERENO & ARCUCCI, 1990

COHORT: CROCODYLOTARSI BENTON & CLARK, 1988

MAGNORDER: SUCHIA KREBS, 1974

SUPERORDER: CROCODYLOMORPHA WALKER, 1968

GRANDORDER: CROCODILIFORMES HAY, 1930

MICRORDER: MESOEUROCROCODYLIA WHETSTONE & WHYBROW, 1983

ORDER: EUSUCHIA emend HUXLEY, 1875

Family: BOREALOSUCHIDAE emend BROCHU, 1999

Borealosuchus riggsi
= Leidyosuchus riggsi
*Borealosuchus formidabilis
= Leidyosuchus formidabilis

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NORTH DAKOTA

BILLINGS COUNTY

WANNAGAN CREEK QUARRY

BULLION CREEK (TONGUE RIVER) FORMATION

LATE PALEOCENE EPOCH

LOWER PALEOGENE PERIOD

LOWER TERTIARY SUBERA

CENOZOIC ERA

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT: CRUROTARSI SERENO & ARCUCCI, 1990

COHORT: CROCODYLOTARSI BENTON & CLARK, 1988

MAGNORDER: SUCHIA KREBS, 1974

SUPERORDER: CROCODYLOMORPHA WALKER, 1968

GRANDORDER: CROCODILIFORMES HAY, 1930

MICRORDER: MESOEUROCROCODYLIA WHETSTONE & WHYBROW, 1983

ORDER: EUSUCHIA emend HUXLEY, 1875

INFRAORDER: CROCODYLIA emend GMELIN, 1877

PARVORDER: BREVIROSTRES

Superfamily: ALLIGATORIDEA Buffetaut, 1985

GLOBIDONTA BROUCHU, 1999

Family: ALLIGATORIDAE Gray, 1844

Subfamily: ALLIGATORINAE Gray, 1844 (sensu Kalin, 1940)

Tribe: ALLIGATORINI nova

Allognathosuchus wartheni
= *Wannaganosuchus brachymanus

Genus sp indet.

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NORTH DAKOTA

SOUTHERN BILLINGS COUNTY

LITTLE MISSOURI BADLANDS

LANCE FORMATION

LANCIAN AGE

UPPER MAASTRICHTIAN STAGE

UPPERMOST SENONIAN SUBEPOCH

UPPER UPPER GULF EPOCH

LATE CRETACEOUS

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUBLEGION: DINOSAUROMORPHA BENTON & NORMAN IN BENTON, 1985

INFRALEGION: DINOSAURIFORMES NOVAS, 1992

SUPERCOHORT: DINOSAURIA OWEN, 1842

COHORT: ORNITHISCHIFORMES COOPER, 1985

MAGNORDER: ORNITHISCHIA SEELEY, 1888

SUPERORDER: NEORNITHISCHIA COOPER, 1985

GRANDORDER: ORNITHOPODA MARSH, 1871

MICRORDER: MARGINOCEPHALIA SERENO, 1986

ORDER: CERATOPIA MARSH, 1890

SUBORDER: NEOCERATOPIA SERENO, 1986

INFRAORDER: CORONOSAURIA SERENO, 1986

PARVORDER: CERATOPOMORPHA Wolfe & Kirkland, 1998 (emend)

Superfamily: CERATOPOIDEA Marsh, 1888 (sensu Hay, 1902)

Family: CERATOPIDAE Marsh, 1888

Subfamily: CERATOPIINAE Marsh, 1888 (sensu Abel, 1919)

Tribe: TRICERATOPINI nova

Triceratops sp

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