Tancrediidae Meek, 1864
Key morphological features: Shells are small to medium in size and elongated to one side. They are mostly smooth, sometimes with weak ornamentation.
MOBILITY: Mobile (burrow)
FEEDING MODE: Deposit 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.