UTAH
GARFIELD COUNTY
OMNH LOCALITY V856
JOHN HENRY MEMBER
STRAIGHT CLIFFS FORMATION
LOWER OR MIDDLE CONIACIAN STAGE
LOWEST SENONIAN SUBEPOCH
LOWER GULF EPOCH
EARLY LATE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: MAMMALIA LINNAEUS, 1758
SUBCLASS: PROTOTHERIA GILL, 1872
INFRACLASS: HOLOTHERIA (WIBEL, ROUGIER, NOVACEK, MCKENNA & DASHZEVEG, 1995) MCKENNA & BELL, 1997
SUPERLEGION: SYMMETRODONTA (SIMPSON, 1925) McKENNA & BELL, 1997
LEGION: SYMMETRODONTA SIMPSON, 1925
ORDER: SPALACOTHERIIDA PROTHERO, 1981
Family: SPALACOTHERIIDAE Marsh, 1887
Subfamily: SPALACOLESTINAE Cifelli & Madsen, 1999
Symmeterodontoides sp. cf. S. oligodontos
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