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Key to Irish Chitons
Species Description


Stenosemus albus (Linnaeus 1767) [back to the Key] | [next] | [previous]
Length: 12-17 mm, up to 22 mm

Tegmentum colour: Uniform creamy white to very light tan, sometimes with concentric orange or brown streaks. Some specimens have black mineral deposits, particulary on the posterior edges of the valves (or completely covering the valves and girdle).

Sculpture: smooth and glossy to the naked eye, end valves and lateral areas with several concentric growth rings

Girdle: coloured like tegmentum, covered in small scales

Bathymetric range: shallow subtidal to 1000m (most common from 10-100 m)

Geographic range: An artic-boreal species, found in the North Atlantic and North Pacific. In the northern Atlantic Ocean, found from Norway to Spain. It the Pacific, it has been recorded from Alaska to California, and from northern Russian and Japan. It’s presence in Ireland is as yet unconfirmed.

Similar species: Other Leptochiton spp.


Taxonomy and Synonymy:

FAMILY: Ischnochitonidae (Dall 1889)



Stenosemus albus (Linnaeus 1767 : Chiton)


Original name: Chiton albus Linnaeus, 1767

Synonymised names:

Chiton albus Linnaeus, 1767 · unaccepted (original combination)

Chiton aselloides R. T. Lowe, 1825 · unaccepted > junior subjective synonym

Chiton minimus Gmelin, 1791 · unaccepted (dubious synonym)

Chiton oryza Spengler, 1797 · unaccepted (dubious synonym)

Chiton sagrinatus Couthouy, 1838 · unaccepted (synonym)

Chondropleura alba (Linnaeus, 1767) · unaccepted

Ischnochiton (Lepidopleuroides) albus (Linnaeus, 1767) · unaccepted > superseded combination

Ischnochiton albus (Linnaeus, 1767) · unaccepted

Ischnochiton albus var. infuscatus (Sparre-Schneider, 1881) · unaccepted > junior subjective synonym

Lepidochiton albus (Linnaeus, 1767) · unaccepted

Lepidochitona alba (Linnaeus, 1767) · unaccepted

Lepidopleuroides albus (Linnaeus, 1767) · unaccepted

Leptochiton albus (Linnaeus, 1767) · unaccepted

Lophyrochiton albus (Linnaeus, 1767) · unaccepted

Lophyrochiton albus var. infuscatus (Sparre-Schneider, 1881) · unaccepted > junior subjective synonym

Lophyrus albus (Linnaeus, 1767) · unaccepted

Lophyrus albus var. infuscata Sparre-Schneider, 1881 · unaccepted (synonym)

Trachydermon albus (Linnaeus, 1767) · unaccepted


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