PORT PHILLIP BAY


Chiton 

Cryptoplax iredalei Ashby, 1923

View scientific description and taxonomy

Scientific Details

Suborder and Family level characters:
Valves usually separated, body shape vermiform.
Insertion plate of anterior valve with 3 slits.
Insertion plates of valves 2-8 without slits.

Species level characters:
Valves small, long and very narrow (narrower than C. striata), with longitudinal ridges. Posterior four or so valves separated (touching in young individuals). Girdle with dense covering of very fine spicules.

Sources:
Macpherson, J. H. and Gabriel, C. J. (1962) Marine Molluscs of Victoria.
Kass, P., Jones, A. M. and Gowlett-Holmes, K. L. (1998) Polyplacophora, in: Mollusca: the southern synthesis, Australian Biological Resources Study.

Taxonomy

Phylum:
Mollusca
Class:
Polyplacophora
Order:
Neoloricata
Suborder:
Acanthochitonina
Family:
Cryptoplacidae
Genus:
Cryptoplax
Species:
iredalei

General Description

Narrow, flattened oval shaped body with 8 shell sections (valves) surrounded by a fleshy girdle. Plates (valves) on top of the body are small and most are separated by skin (girdle). Brown to red-brown, or with bands of light and dark colour. Up to 12 cm long.

Biology

This worm-like chiton is known for its small valves which are embedded in a comparatively large fleshy girdle. The valves are often touching in young individuals, separating as the animal grows older. They can twist their body more than most chitons because of these small, separated plates.

Habitat

Under rocks, in tidal pools, to below low tide level, to depth of 36 m.

Reefs

Coastal shores

Distribution guide

Southern Australia.

Species Group

Sea snails and shells Chitons

Depth

Shore (0-1 m)
Shallow (1-30 m)

Water Column

On or near sea floor

Max Size

12 cm

Diet

Herbivore

Commercial Species

No

Global Dispersal

Native to Australia

Identify

Conservation Status

  • DSE Advisory List : Not listed
  • EPBC Act 1999 : Not listed
  • IUCN Red List : Not listed

Author

article author Patullo, B.

Blair Patullo is Online Producer for marine projects at Museum Victoria.

citation

Cite this page as:
Patullo, B., 2011, Chiton, Cryptoplax iredalei, in Taxonomic Toolkit for marine life of Port Phillip Bay, Museum Victoria, accessed 21 Sep 2017, http://portphillipmarinelife.net.au:8098/species/5700

Text: creative commons cc by licence