Locus typicus: northeastern Orocopia Mountains, southern California, USA
Stratum typicum: Maniobra Formation, early Eocene
References
Richard L. Squires and David M. Advocate, 1986. New Early Eocene Mollusks from the Orocopia Mountains, Southern California. Journal of Paleontology, Vol. 60, No. 4 (Jul., 1986), pp. 851-864
