CANADA

ALBERTA PROVINCE

APPROXMATELY 164 KM SOUTH OF CALGARY

ALONG THE OLDMAN RIVER IN THE AREA OF WALDRON FLATS

UPPERMOST ST. MARY RIVER FORMATION

AND LOWERMOST WILLOW CREEK FORMATION

MAASTRICHTIAN STAGE

UPPERMOST SENONIAN SUBEPOCH

UPPERMOST 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

*Regaliceratops peterhewsi

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