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Falmouth, UK
M010325


M010109


M010110

Channel Is. Herm
M010321

Channel Is. Herm
M010322

Channel Is. Herm
M010323

Channel Is. Herm
M010324

Falmouth, UK
M010326

Herm, Channel Islands, UK, NE Atlantic
M010327

Herm, Channel Islands, UK, NE Atlantic
M010328

Channel Is. Herm.
M010521

Channel Is. Herm.
M010522

Channel Is. Herm.
M010523

Channel Is. Herm.
M010524

Channel Is. Herm.
M010525

Channel Is. Herm.
M010526


M010851


M010852


M010853


M010854


M010855


M010856


M010857
Glycymeris glycymeris (Linnaeus, 1758)
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NMW Image No.

Glycymeris glycymeris (Linnaeus, 1758)

Arcoidea : Glycymerididae
Tebble name: Glycymeris glycymeris (Linnaeus)
Smith & Heppell name: Glycymeris glycymeris (L., 1758)

To size: To 65mm. Shell Structure: Thick, robust. Equivalve: Equivalve. Equilateral: Appears equilateral but beaks just behind the midline. Tumidity: Not tumid. Outline: Subcircular, some with a distinct angular posterior margin, umbos low; dorsal margin short, straight; posterior a little more acute than anterior but both broadly rounded. Lateral margins in juvenile more straight. Contour: Dorsal area narrow, cleft; Evenly rounded.

Sculpture: Indistinct but of very numerous fine incised radial grooves cut by equally numerous comarginal lines and growth stops. Smaller shells appear ribbed and cancellate. Margin: Crenulate. Ligament: Duplivincular, strong, set on both sides of the beak. Hinge: Very strong, taxodont; teeth in two series separated by a small edentulous space set on an arched hinge plate, up to 12 teeth in each series. Pallial Musculature: Anterior adductor scar slightly larger than posterior. Periostracum: Pilose, of brown, dense, short hairs arising from radial grooves, usually persists only at margins. Colour: Mostly maculated white and brown, some more densely shades of brown all over; interior white or brown – purplish brown inside pallial line.



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Distribution & Ecology


A shallow burrower, often exposed, in gravels and mixed substrates especially in areas of high current. At sublittoral and shelf depths in all areas but apparently absent from the southern North Sea.

Depth Range
Continental Shelf (to 200m)


Juveniles & Similar Species

Juvenile Description
At 0.5 mm the shell and inner margins are smooth, only two teeth on either side; by 2mm radial sculpture and marginal crenulations appear and teeth number 4 on each side.

Key Features & Similar Species
Externally early juveniles appear veneroid but hinge distinctive.

Additional Comments

Arcoidea : Glycymerididae

References


Listed are literature citing Glycymeris glycymeris (Linnaeus, 1758). Reference containing the species Type Description is highlighted.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.
Thomas R D K 1975. Functional morphology, ecology, and evolutionary conservatism in the Glycymerididae (Bivalvia). Palaeontology. 18: 217–258.
Thomas R D K 1978. Shell Form and the Ecological Range of Living and Extinct Arcoida. Paleobiology. 4(2): 181-194.

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