Lohman, K. E. 1948. MD. Dept. Mines & Geology. Bulletin 2: 156, plate V, figs. 1-7.
Type Status:
Holotype
Place:
Larry G. Hammond Well No. 1, Ohio Oil Company, near Salisbury, depth 1020-1030 feet [Calvert Formation, Middle Miocene], Wicomico County, Maryland, United States, North America