Wrinkled rock borer (Hiatella arctica)
|Researched by||Michelle Carter||Refereed by||Admin|
|Other common names||-||Synonyms||Hiatella rugosa (Linnaeus, 1767), Hiatella gallicana (Linnaeus, 1767)|
Recorded distribution in Britain and IrelandCommon all around Britain and Ireland.
Global distributionThis species is widely distributed, from the Arctic south to the Atlantic, the Mediterranean and the Pacific Ocean.
HabitatThis species attaches by thread-like hairs in holes, crevices or algal holdfasts. It often bores into soft rock and shells. Found on the lower shore and down to about 50 m in depth.
- Rarely more than 4 cm in length.
- White in colour with a yellow brown periostracum.
- Rough in texture.
- Thick, irregular ridges.
- One short cardinal tooth in the right valve and two on the left and often worn away in older shells.
- The posterior adductor muscle scar is slightly larger than the anterior scar but both are rounded.
- The hinge line is undulating.
- The pallial line is not continuous but made up of separate muscle scars.
Additional informationThis species is a suspension feeder, catching particles of food as it passes. The type of substratum selected by juveniles determines whether they become burrowers or nestlers. Those settling on hard rock will attach by thread-like hairs and become nestlers while juveniles settling on soft rock become burrowers. The adults are able to bore into rock by mechanical abrasion using the valves of the shell. The initial penetration of the rock by juveniles may involve chemical as well as mechanical means.
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This review can be cited as:
Last Updated: 10/09/2003