Chiton families

Chitonidae is a family of chitons or polyplacophorans, marine mollusks whose shell is composed of eight articulating plates or valves. There are fifteen extant genera in three subfamilies.

Ischnochitonidae is a family of polyplacophoran mollusc belonging to the superfamily Chitonoidea.

Leptochitonidae is a of polyplacophoran mollusc. While the subfamily Leptochitoninae has both extant and extinct species, all members of Helminthochitoninae are extinct.

Mopaliidae is a family of marine molluscs in the class Polyplacophora.

Acanthochitonidae is a family of marine mollusks belonging to the class Polyplacophora, commonly known as chitons. Species are widely distributed throughout the world's oceans, but are most commonly found in the shallow waters of the Pacific Ocean, from Alaska to Chile.

Hemiarthrumidae is a family of chitons belonging to the order Chitonida.

Choriplacidae is a family of chitons belonging to the order Chitonida.

Callistoplacidae is a family of chitons belonging to the order Chitonida.