 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 |
''
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
References
Listed are literature citing Glycymeris glycymeris (Linnaeus, 1758). Reference containing the species Type Description is highlighted.
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Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp. |
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Thomas R D K 1975. Functional morphology, ecology, and evolutionary conservatism in the Glycymerididae (Bivalvia). Palaeontology. 18: 217–258. |
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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.