''Cryptoconchus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

chiton Chitons () are marine molluscs of varying size in the class Polyplacophora (), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized. They are also sometimes known as gumboots or sea cradles or coat-of-mail s ...

s in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Acanthochitonidae Acanthochitonidae is a family of chitons, marine molluscs in the class Polyplacophora. Description These small to large chitons are characterised by a broad girdle with erect tufts of up to ten large bristles. The coarsely granular valves of the ...

Species

* ''

Cryptoconchus porosus ''Cryptoconchus porosus'', the butterfly chiton, is a species of chiton, a marine polyplacophoran mollusc in the family Acanthochitonidae. Description ''Cryptoconchus porosus'' is a large chiton reaching a length of about . The eight valves ...

'' - the ''butterfly chiton'' * '' Cryptoconchus floridanus'' - the ''white-barred chiton''

Extinct species

The genus is also represented in the fossil record, in Pliocene and Pleistocene rocks.

References

* * Powell A W B, ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979 Acanthochitonidae Extant Pliocene first appearances {{Chiton-stub