Oxtomidae Ichikawa, 1958
Key morphological features: Shell shapes range from oval, circular, to elongated. Ornamentation can vary with notches, grooves, and ribbing.
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.