From editor or global species database
Type locality Type locality not provided in original publication, but specified by Pilsbry (1935, p. 545, 556): "Basal part of the Tulare formation: Shell Oil Company loc. K-62, North Dome Kettleman Hills, 2000 ft. west, 600 ft. south of N.E. corner of sec. 30, T. 21 S., R. 17 E." (California, United States) [details]