CANADA

ALBERTA PROVINCE

PAINTEARTH COUNTY

PAINTEARTH CREEK

HORSESHOE CANYON FORMATION

EDMONTON GROUP

EDMONTONIAN AGE

LOWER MAASTRICHTIAN STAGE

UPPER 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 coyi

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