BOWMAN COUNTY
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 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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NORTH DAKOTA
BOWMAN COUNTY
PTRM-V92067
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: MAMMALIA LINNAEUS, 1758
SUBCLASS: THERIIFORMES (ROWE, 1988) McKENNA & BELL, 1997
INFRACLASS: ALLOTHERIA (MARSH, 1880) McKENNA & BELL, 1997
ORDER: MULTITUBERCULATA COPE, 1884
SUBORDER: CIMOLODONTA McKENNA, 1975
Superfamily: PTILODONTOIDEA Cope, 1887 (sensu McKenna & Bell, 1997)
Family: PTILODONTIDAE Cope, 1887 (sensu McKenna & Bell, 1997)
Subfamily: NEOPLAGIAULACINAE Ameghino, 1890 (sensu McKenna & Bell, 1997)
Mesodma thompsoni
Mesodma spFamily: CIMOLODONTIDAE Marsh, 1889
Cimolodon sp
Superfamily: TAENIOLABIDOIDEA Granger & Simpson, 1929 (sensu McKenna & Bell, 1997)
Family: TAENIOLABIDIDAE Granger & Simpson, 1929
Meniscoessus robustus
Meniscoesus spSUBCLASS: PROTOTHERIA GILL, 1872
INFRACLASS: TRECHNOTHERIA McKENNA, 1975
LEGION: CLADOTHERIA McKENNA, 1975
SUBLEGION: ZATHERIA MCKENNA, 1975
INFRALEGION: TRIBOSPHENIDA (McKENNA, 1975) McKENNA & BELL, 1997
SUPERCOHORT: THERIA (PARKER & HASWELL, 1987) McKENNA & BELL, 1997
COHORT: MARSUPIALIA (ILLIGER, 1811) McKENNA & BELL, 1997
ORDER: STAGODONTIA ARCHER, 1984
Family: STAGODONTIDAE Marsh, 1889
Didelphodon vorax
Didelphodon spFamily: PEDIOMYIDAE Simpson, 1927
Pediomys sp Cf. ‘P’. florencae
COHORT: PLACENTALIA (OWEN, 1837) McKENNA & BELL, 1997
MAGNORDER: EPITHERIA (McKENNA, 1975) McKENNA & BELL, 1997
SUPERORDER: PREPTOTHERIA McKENNA, 1975
GRANDORDER: UNGULATOMORPHA ARCHIBALD, 1996
Family: GYPSONICTIPIDAE Van Valen, 1967
Gypsonictops illuminatus
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