Chitons

Chitons () are marine molluscs of varying size in the class Polyplacophora ( ), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized.

Neoloricata comprises the living representatives of the polyplacophoran molluscs, but also includes several species only known from fossils.

Chitonida is an order of chitons. The order was erected to class chitons with elaborate hull outgrowths on their eggs.

species of mollusc

Lepidopleurida is an order of molluscs belonging to the class Polyplacophora. The order Lepidopleurida is the oldest group of polyplacophoran molluscs Families: Abyssochitonidae †Acutichitonidae Afossochitonidae †Camptochitonidae †Cymatochitonidae †Glyptochitonidae †Gryphochitonidae Hanleyidae †Heterochitonidae †Lekiskochitonidae Leptochitonidae †Llandeilochitonidae †Mesochitonidae Nierstraszellidae †Permochitonidae Protochitonidae

Acanthochitonina is a of polyplacophoran mollusc comprising both fossil and extant species.

anatomical term applied to the shell of molluscs

Lepidopleurina is a suborder of polyplacophoran molluscs. It includes both extinct and extant species.