MacNeil, F. S., and Dockery, D. T, III, 1984. Lower Oligocene Gastropoda, Scaphopoda, and Cephalopoda of the Vicksburg Group in Mississippi. Bulletin - Mississippi Department of Natural Resources, Bureau of Geology, 124: 1 -415 .
New Species-Group Names:
- spiralis Dockery, 1984. p. 165. pl. 59. f. 3. 4.