Class Polyplacophora



Acanthochitona fascicularis

Acanthochitona crinita


The commonest and most widespread chiton found on British rocky shores is Lepidochitona cinerea. On many shores it is the only species to be found.

Acanthochitona (Photograph by Andy Horton)

Acanthochitona fascicularis is a larger species. This one is 29 mm long and 20 mm wide (widest part).
It was discovered on Lancing beach, Sussex.

Class Polyplacophora

Family Leptochitonidae
Leptochiton asellus  (Gmelin 1791)
Leptochiton cancellatus  (Sowerby G.B. II 1840)
Leptochiton scabridus  (Jeffreys 1880)
Family Hanleyidae
Hanleya hanleyi  (Bean in Thorpe 1844)
Family Ischnochitonidae
Ischnochiton albus (Linnaeus 1767)
Callochiton septemvalvis  (Montagu 1803)
Lepidochitona cinerea  (Linnaeus 1767)
Tonicella marmorea  (Fabricius O. 1780)
Tonicella rubra  (Linnaeus 1767)
Family Acanthochitonidae
Acanthochitona crinita  (Pennant 1777)
Acanthochitona discrepans  (Brown 1827)  Not a good species, the same as Acanthochitona crinita ?
Acanthochitona fascicularis  (Linnaeus 1767)

Leptochiton J E Gray, 1847 Perhaps a subgenus of Lepidopleurus; see Dell"Angelo & Palazzi (1989).
Leptochiton (Leptochiton) J E Gray, 1847
Leptochiton asellus (Gmelin, 1791) Synonym: Lepidopleurus asellus.
Leptochiton cancellatus (G B Sowerby II, 1840) Synonym: Lepidopleurus cancellatus.
Leptochiton gascognensis Kaas & Belle, 1985
Leptochiton leloupi Kaas, 1979 Southern/western distribution.
Leptochiton sarsi Kaas, 1981 A northern species not yet recorded in area. Synonym: Lepidopleurus cancellatus G O Sars, 1878, non Chiton cancellatus G B Sowerby II, 1840.
Leptochiton scabridus (Jeffreys, 1880) Synonym: Lepidopleurus scabridus.
Leptochiton tenuis Kaas, 1979 Southern/western distribution.
Lepidopleurus Risso, 1826
Lepidopleurus cajetanus (Poli, 1791) Southern/western distribution.
Hanleya J E Gray, 1857
Hanleya hanleyi (Bean in Thorpe, 1844)
Hanleya nagelfar (Lovén, 1846) A northern species usually in deep water. See Kaas & Belle (1985a) and Warén & Klitgaard (1991) for discussion of its taxonomic status. Synonym: H. abyssorum (G O Sars, 1878).
Ischnochiton J E Gray, 1847
Ischnochiton (Stenosemus) Middendorff, 1847
Ischnochiton albus (Linnaeus, 1758)
Ischnochiton exaratus (G O Sars, 1878) A northern species.
Callochiton J E Gray, 1847
Callochiton septemvalvis (Montagu, 1803)
Lepidochitona J E Gray, 1821
Lepidochitona (Lepidochitona) J E Gray, 1821
Lepidochitona cinerea (Linnaeus, 1758)
Tonicella Carpenter, 1873
Tonicella marmorea (O Fabricius, 1780)
Tonicella rubra (Linnaeus, 1758)
Acanthochitona J E Gray, 1821
Acanthochitona crinita (Pennant, 1777)
Acanthochitona fascicularis (Linnaeus, 1758) 

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