Chitonidae

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.

Subfamilies and genera
Subfamilies and genera within the family Chitonidae include:
 * Subfamily Chitoninae Rafinesque, 1815
 * Chiton Linnaeus, 1758 – the type genus of the family
 * Amaurochiton Thiele, 1893
 * Radsia Gray, 1847
 * Sypharochiton Thiele, 1893
 * Nodiplax Beu, 1967
 * Rhyssoplax Thiele, 1893
 * Teguloaplax Iredale & Hull, 1926
 * Mucrosquama Iredale, 1893
 * Subfamily Toniciinae Pilsbry, 1893
 * Tonicia Gray, 1847
 * Onithochiton Gray, 1847
 * Subfamily Acanthopleurinae Dall, 1889
 * Acanthopleura Guilding, 1829
 * Liolophura Pilsbry, 1893
 * Enoplochiton Gray, 1847
 * Squamopleura Nierstrasz, 1905