Scaphitidae Hyatt, 1900
Key morphological features: The inner shell is tightly coiled before unfolding into a hook shape. Ornamentation can vary in amounts of ribbing, bumps, and projections. Suture lines branch out into five lobes which can become divided in half or thirds.
MOBILITY: Mobile (swim)
FEEDING MODE: Predator
Wright, C. W., 1996. Ammonoidea, in Kaesler, R. L., ed., Treatise on Invertebrate Paleontology, Part L, Mollusca 4 Revised, Volume 4. The University of Kansas and Geological Society of America. 362 pp.