Chitonida

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

Taxonomy

 * Acanthochitonidae Pilsbry, 1893
 * Callistoplacidae Pilsbry, 1893
 * Callochitonidae Plate, 1901
 * Chaetopleuridae Plate, 1899
 * Chitonidae Rafinesque, 1815
 * Choriplacidae Ashby, 1928
 * Cryptoplacidae Adams & Adams, 1858
 * Hemiarthridae Sirenko, 1997
 * Ischnochitonidae Dall, 1889
 * Mopaliidae Dall, 1889
 * †Ochmazochitonidae Hoare et Smith, 1984
 * Schizochitonidae Dall, 1889
 * Schizoplacidae Bergenhayn, 1955
 * Tonicellidae Simroth, 1894