There are 2 matches

Collection Authorizer Collection name Reference
17055J. Alroy Anxiety Butte (Orellan) Orellan - Cenozoic 4 - Canada Storer (1996)
17306J. Alroy Anxiety Butte (SMNH 72F10-0049) Whitneyan/Monroecreekian - Cenozoic 4 - Canada Storer and Bryant (1993)

Do another search