LEWIS AND CLARK COUNTY

AUGUSTA

ST. MARY RIVER FORMATION

EDMONTONIAN AGE

LOWER MAASTRICHTIAN STAGE

UPPER SENONIAN SUBEPOCH

UPPER GULF EPOCH

LATE CRETACEOUS

VETEROVATA

OOSUPERCOHORT: DINOSAURIOVUM VIALOV, 1975

Incertae sedis

Gen. sp indet.