MarLIN

information on the biology of species and the ecology of habitats found around the coasts and seas of the British Isles

A stalked barnacle (Scalpellum scalpellum)

Distribution data supplied by the Ocean Biogeographic Information System (OBIS). To interrogate UK data visit the NBN Atlas.

Summary

Description

Pedunculate, goose or goose-neck barnacles have a flexible, muscular stalk, known as the peduncle, which supports the main body known as the capitulum. Scalpellum scalpellum is typically whitish grey and grows up to 3 cm in height. The stalk is armoured with embedded calcareous scales. The capitulum is comprised of 13 distinct plates and a rudimentary rostrum, but is often covered by an epidermis with small articulated spines which can obscure these details. Scalpellum scalpellum is an androdioecious species, that is that there are hermaphrodites and males present. For Scalpellum scalpellum the typical individual is hermaphroditic and the dwarf complemental males can be found attached to the inside of the capitulum.

Recorded distribution in Britain and Ireland

A few records off the Northeast coast of Britain but predominantly recorded off the South and West coasts of Britain and Ireland.

Global distribution

Found from tropical West Africa and the Azores to Norway.

Habitat

Scalpellum scalpellum attaches to hard substrates, including rocks, hydroids, bryozoans and gorgonians, ranging from the subtidal to around 400 m.

Depth range

-

Identifying features

  • Stalk with numerous transverse rows of calcareous scales.
  • Apex of capitulum pointed.
  • Capitulum with 14 plates (rostrum rudimentary).
  • Capitulum longer than stalk.
  • Carina with distinct angle near midpoint.

Additional information

This is the only shallow water scalpellid barnacle in British waters. However, there are many similar species in deep waters with which Scalpellum scalpellum could be easily confused. Distinguishing scalpellid barnacles can be difficult and often requires dissection and the examination of the soft tissues.

Listed by

- none -

Further information sources

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Bibliography

    Citation

    This review can be cited as:

    Hosie, A.M. 2008. Scalpellum scalpellum A stalked barnacle. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Available from: http://www.marlin.ac.uk/species/detail/2235

    Last Updated: 09/10/2008