UTAH
WASATCH PLATEAU
DRAGON CANYON
NORTH HORN FORMATION
LANCIAN AGE
UPPER MAASTRICHTIAN STAGE
UPPERMOST SENONIAN SUBEPOCH
UPPER GULF EPOCH
LATE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: MAMMALIA LINNAEUS, 1758
SUBCLASS: 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
Family: PEDIOMYIDAE Simpson, 1927
Pediomys hatcheri
= Protolambda hatcheri
UTAH
SOUTH SIDE OF NORTH HORN MOUNTAIN
NORTH HORN FORMATION
LANCIAN AGE
UPPER MAASTRICHTIAN STAGE
UPPERMOST SENONIAN SUBEPOCH
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 CHORISTODERA NOVA
ORDER: CHORISTODERA COPE, 1876
Family: CHAMPSOSAURIDAE Cope, 1884
Incertae sedis
Champsosaurus sp
UTAH
NORTH HORN FORMATION
LANCIAN AGE
UPPER MAASTRICHTIAN STAGE
UPPERMOST SENONIAN SUBEPOCH
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
Incerate sedis
Gen. sp. indet.
CLASS: MAMMALIA LINNAEUS, 1758
SUBCLASS: 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
MAGNORDER: AMERIDELPHIA (SZALAY, in ARCHER, ED, 1982) McKENNA & BELL, 1997
ORDER: DIDELPHIMORPHIA GILL, 1872
Family: DIDELPHIDAE Gray 1821
Subfamily: ALPHADONTIDAE Marshall, Case & Woodburne, 1990
Alphadon sp
VETEROVATA
OOSUPERCOHORT: DINOSAURIOVUM VIALOV, 1975
Incertae sedis
Gen. sp indet.
CENTRAL UTAH
WASATCH PLATEAU
SEVERAL TRACK BED LOCALITIES
NORTH HORN FORMATION
LANCIAN AGE
UPPER MAASTRICHTIAN STAGE
UPPERMOST SENONIAN SUBEPOCH
UPPER GULF EPOCH
LATE CRETACEOUS
ICHNOSTEM: TETRAPODIPIDA NOVA
ICHNOSUPERCLASS: AMNIOTAIPIDII NOVA
ICHNOCLASS: REPTILIPEDIA VIALOV, 1966
ICHNOSUBCLASS: DIAPSIDIPIDII NOVA
ICHNOSTEM-GROUP: NEODIAPSIDIPEDII NOVA
ICHNOINFRACLASS: NEODIAPSIDIPEDII NOVA
ICHNOSUBDIVISION: ARCHOSAURIPEDIDII NOVA
ICHNOSUPERCOHORT: AVEMETATARSALIPEDII NOVA
ICHNOLEGION: DINOSAUROMORPHIPEDA NOVA
ICHNOSUBLEGION: DINOSAURIFORMEIPEDIDII NOVA
ICHNOSUPERCOHORT: DINOSAUROPEDIDA NOVA
Incerate sedis
Gen. sp indet.