MONTEZUMA COUNTY

MCELMO CANYON

BRUSHY BASIN MEMBER

MORRISON FORMATION

UPPER PART

COMOBLUFFIAN AGE

TITHONIAN STAGE

UPPERMOST MALM EPOCH

LATE JURASSIC

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: THEROPODA EMEND MARSH, 1881

AVEPODA PAUL, 2002

SUPERORDER: NEOTHEROPODA BAKKER, 1986

GRANDORDER: TETANURAE GAUTHIER, 1986

ORDER: NEOTETANURAE SERENO, WILSON, LARSSON, DUTHEIL &

SUBORDER: AVETHEROPODA PAUL, 1988

Superfamily: ALLOSAUROIDEA Marsh, 1878 (sensu Currie & Zhao, 1994)

Family: ALLOSAURIDAE Marsh, 1878

*Allosaurus lucasi

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