Collignoniceratidae Wright & Wright, 1951
Key morphological features: Shells tend to be more involute than evolute with one to five projections on ribs. Shell whorls are oval to square in shape.
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.