Baculitidae Gill, 1871
Key morphological features: The first one to two shell whorls are coiled then straightening out or having a slight curve. Surface of the shell is smooth or slight ribbing. Suture lines have a two-part notch and vary in detail.
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.