UTAH

EMERY COUNTY

BLACK HAWK FORMATION

MAASTRICHTIAN STAGE

UPPERMOST SENONIAN SUBEPOCH

UPPERMOST 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

ICHNOMAGNORDER: PROLACERTIFORMIPEDIDA NOVA

ICHNOORDER: PTEROSAURIPEDIDA EMEND VIALOV, 1966

Ichnofamily: PTERAICHNIDAE emend Lockley, Logue, Moratalla, Hunt, Schultz & Robinson, 1995

Pteraichnus sp

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