There are 2 matches

Collection Authorizer Collection name Reference
57779M. Uhen Santa Rosalia, Pliocene (= IGM Loc 81) Pliocene - Cenozoic 6 - Mexico Barnes (1998)
154117M. Uhen Corkscrew Hill (= B.C.S. 2 or Loma del Tirabuzón) Messinian/Zanclean - Cenozoic 6 - Mexico Applegate (1978)

Do another search