Unifascia carolinensis (Clark, in Clark & Twitchell, 1915); Castle Hayne Limestone, Middle Eocene, Castle Hayne, North Carolina, USA. Apical view (from Cooke, C. W. 1959. Cenozoic echinoids of Eastern United States. United States Geological Survey Professional Paper 321, 1-103, pls 1-43 (pl. 34).
Length of test 44 mm.