Editor LoginSpecies Account


Guernsey, Channel Islands, UK, NE Atlantic
M010780

Guernsey, Channel Islands, UK, NE Atlantic
M010779

Guernsey, Channel Islands, UK, NE Atlantic
M010781

Guernsey, Channel Islands, UK, NE Atlantic
M010782
Anomia ephippium Linnaeus, 1758
''
NMW Image No.

Anomia ephippium Linnaeus, 1758

Anomioidea : Anomiidae
Tebble name: Anomia ephippium Linnaeus
Smith & Heppell name: Anomia ephippium L.,1758

To size: To 60mm. Shell Structure: Upper valve rather solid, lower valve thinner but robust. Equivalve: Inequivalve, upper (left) valve convex; lower (right valve) flat. Equilateral: Inequilateral, beaks close to the middle of the dorsal margin. Outline: Upper valve subcircular but irregular, lower valve similar with a large oval byssus foramen. Contour: Often deformed to fit shape of attachment area.

Sculpture: Upper valve surface scaly, may be worn smooth and lustrous but mostly overgrown with attached epifauna; lower valve scaly with comarginal lines and growth stops. Margin: Irregular but smooth. Ligament: In a half moon shaped pit beneath the beaks. Hinge: Obscure. Pallial Musculature: Upper valve with three scars, a large and small byssus muscle scar and a small adductor muscle scar; lower valve with a single adductor muscle scar. Periostracum: Obscure. Colour: White with pink, purple and beige zones showing when worn; lower valve white. Internal of both valves highly lustrous.



Distribution map legend
No Image Available
Plate 1
No Image Available
Plate 2
No Image Available
Plate 3
No Image Available
Plate 4
No Image Available
Plate 5
Plate 1 Plate 2 Plate 3 Plate 4 Plate 5

Distribution & Ecology


Low intertidal and sublittoral (rare beyond 20m) on the south and west coasts Britain, north to Shetland, and on all coasts of Ireland. Its occurrence on the east coast of Britain and in the North Sea is uncertain and requires confirmation from living specimens. Epifaunal, attached by the byssus to hard substrates mostly in sheltered conditions.

Depth Range
Intertidal
Continental Shelf (to 200m)


Juveniles & Similar Species

Juvenile Description

Key Features & Similar Species

Additional Comments
Anatomy – Ctenidium with reflected filaments

Anomioidea : Anomiidae

References


Listed are literature citing Anomia ephippium Linnaeus, 1758. Reference containing the species Type Description is highlighted.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.
Winckworth, R I922. Note on the British species of Anomia. Proceedings of the Malacological Society of London. 15: 32-34.
Yonge C M 1977. Form and Evolution in the Anomiacea (Mollusca: Bivalvia)-- Pododesmus, Anomia, Patro, Enigmonia (Anomiidae): Placunanomia, Placuna (Placunidae Fam. Nov.). Philosophical Transactions of the Royal Society of London Series B. 276: 453-523.

Resources


Downloads

Weblinks

  • Conchological Society of Great Britain & Ireland
    Provides resources for understanding, identifying, recording, and conserving molluscs
  • CLEMAM
    Check List of European Marine Mollusca
  • MarLIN
    The Marine Life Information Network for Britain and Ireland (MarLIN) provides information for marine environmental management, protection and education. It is a centre of excellence in spatially based and time-series marine biological information and supports good stewardship in the marine environment.
  • NBN Gateway
    National Biodiversity Network's Gateway. Use it to explore UK biodiversity data, as contributed by participating data providers.
  • BivAToL
  • MarBEF
  • Malacological Society
  • Unitas Malacologica
  • Census of Marine Life
  • MarBEF
    MarBEF, a network of excellence funded by the European Union and consisting of 94 European marine institutes, is a platform to integrate and disseminate knowledge and expertise on marine biodiversity, with links to researchers, industry, stakeholders and the general public.

Record last modified - 15/01/2014