There are 2 matches

Collection Authorizer Collection name Reference
18076J. Alroy Buis Ranch Late Hemphillian - Cenozoic 6 - Oklahoma Hibbard (1954)
18304J. Alroy Optima (= Guymon; OMNH V52; UCMP V-2902) Hemphillian - Cenozoic 6 - Oklahoma - old id Hesse (1936)

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