NORTH DAKOTA
SLOPE COUNTY
NEAR MARMARTH
MPM 3956
HELL CREEK 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
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: PACHYCEPHALOSAURIA MARYANSKA & OSMOLSKA, 1974
SUBORDER: DOMOCEPHALINIA SERENO, 1986
INFRAORDER: PACHYCEPHALOSAURIA (MARYANSKA & OSMOLSKA, 1974) COOPER, 1985
Family: PACHYCEPHALOSAURIDAE Sternberg, 1945
Subfamily: PACHYCEPHALOSAURINAE Sternberg, 1945 (sensu Sereno, 1998)
Stygimoloch spinifer
NORTH DAKOTA
SLOPE COUNTY
NEAR CANNONBALL CREEK
HELL CREEK 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
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 prorsus
NORTH DAKOTA
SLOPE COUNTY
UMCP LOCALITY V86049
HELL CREEK 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
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 Gray, 1844 ( sensu Buffetaut, 1985)
GLOBIDONTA BROUCHU, 1999
Family: ALLIGATORIDAE Gray, 1844
Brachychampsa montana