{{Short description|Order of molluscs}} {{Automatic taxobox | image = Cryptoconchus porosus (butterfly chiton).JPG | taxon = Chitonida | authority = Thiele, 1910 | subdivision_ranks = Families | subdivision = See text }}
'''Chitonida''' is an order of chitons.<ref>{{Cite web |title=Chitonida |url=https://www.gbif.org/species/8278247 |access-date=2023-05-22 |website=www.gbif.org |language=en}}</ref> The order was erected to class chitons with elaborate hull outgrowths on their eggs.<ref>{{Cite book |last1=Ponder |first1=Winston |url=https://books.google.com/books?id=nm0IZAQQ6S0C&dq=Chitonida&pg=PA87 |title=Phylogeny and Evolution of the Mollusca |last2=Lindberg |first2=David R. |date=2008-03-25 |publisher=University of California Press |isbn=978-0-520-25092-5 |language=en}}</ref><ref>{{Cite book |last1=Ponder |first1=Winston Frank |url=https://books.google.com/books?id=6KvQDwAAQBAJ&dq=Chitonida&pg=PT110 |title=Biology and Evolution of the Mollusca, Volume 2 |last2=Lindberg |first2=David R. |last3=Ponder |first3=Juliet Mary |date=2020-02-14 |publisher=CRC Press |isbn=978-1-351-11523-0 |language=en}}</ref>
== Taxonomy ==
* Acanthochitonidae <small>Pilsbry, 1893</small> * Callistoplacidae <small>Pilsbry, 1893</small> * Callochitonidae <small>Plate, 1901</small> * Chaetopleuridae <small>Plate, 1899</small> * Chitonidae <small>Rafinesque, 1815</small> * Choriplacidae <small>Ashby, 1928</small> * Cryptoplacidae <small>Adams & Adams, 1858</small> * Hemiarthridae <small>Sirenko, 1997</small> * Ischnochitonidae <small>Dall, 1889</small> * Mopaliidae <small>Dall, 1889</small> * †Ochmazochitonidae <small>Hoare et Smith, 1984</small> * Schizochitonidae <small>Dall, 1889</small> * Schizoplacidae <small>Bergenhayn, 1955</small> * Tonicellidae <small>Simroth, 1894</small>
==References== {{Reflist}}
==External links== * [https://www.uniprot.org/taxonomy/6652 Chitonida] at [https://www.uniprot.org/ UniProt.org] {{Commons category-inline|Chitonida}}
{{Taxonbar|from=Q5102273}}
Category:Chitons Category:Mollusc orders Category:Chitonida