Lyonsiidae is a family of small saltwater clams, marine bivalve molluscs in the order Anomalodesmata.
Members of this family have inequivalve, oblong valves that are nearly equilateral. The right valve is more convex than the left, and there are usually no teeth. The ligament connecting the two valves is in an internal groove, and the hinge has a free ossicle.[2]
The World Register of Marine Species lists the following genera and species in the family:[1]
Lyonsiidae is a family of small saltwater clams, marine bivalve molluscs in the order Anomalodesmata.
