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Balanus perforatus

Balanus perforatus

Common barnacle

   Balanus perforatus is a cirripedia with a base reaching 3 cm in diameter and up to 5 cm for deeper specimens. The external plates are vertically ribbed. Their pointed ends as well as the conical organization of the plates evoke the form of a small volcano. They are greyish with shades of purple or pink. The operculum that closes the upper aperture is depressed inside the cone formed by the plates. This operculum consists of two pairs of movable plates that open to allow the cirri out so that the barnacle could catch food. In case of emergency or during emersed periods, the operculum is kept hermetically closed thanks to a brown or purple flap with blue and white patches. The common barnacle generally lives in groups attached to rocks or immersed structures such as ships' bottom.
It is found from surface to 20 meters deep in the Atlantic Ocean from West Africa to Wales, in the English Channel and in the Mediterranean Sea.

Classification

 (source : European Register of Marine Species)

  • Arthropoda [Phylum]
  • Crustacea [Subphylum]
  • Maxillopoda [Class]
  • Thecostraca [Subclass]
  • Cirripedia [Infraclass]
  • Thoracica [Superorder]
  • Sessilia [Order]
  • Balanomorpha [Suborder]
  • Balanoidea [Superfamily]
  • Balanidae [Family]
  • Balaninae [Subfamily]
  • Balanus perforatus Bruguiére, 1789

Page glossary


Cirri : Small appendages resembling feathery tentacles.

Authors


Top photograph :
© Wilfried Bay-Nouailhat. Published with author's kind permission : 
Balanus perforatus, Baie de Concarneau, South-Brittany, West of France. Depth 3 meters.
Text :  Anne Bay-Nouailhat © 2007-2014.
Translation :  Anne Bay-Nouailhat © 2007-2014.

How to cite this page in publications


Bay-Nouailhat A., March 2007, Description of Balanus perforatus, Available on line at http://www.european-marine-life.org/24/balanus-perforatus.php, consulted on 20 September 2014.
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