Trigoniidae Lamarck, 1819
Key morphological features: Shells tend to be large with great variation in shape and ornamentation. External ribbing is very dramatic.
MOBILITY: Mobile (burrow)
FEEDING MODE: Suspension Feeder
Cox, L. R. et al. 1969. Bivalvia, in R. C. Moore ed., Treatise on Invertebrate Paleontology, Part N, Mollusca 6, Volume 2. The University of Kansas and Geological Society of America. 1224 pp.