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Tenby
M010260

Tenby
M010259

Tenby
M010261

Tenby
M010262

Firth of Lorn, Oban Bay : 56 24.8 / 5 29.3 : 20-25m
M012104

Firth of Lorn, Oban Bay : 20-25m
M012105

Firth of Lorn, Oban Bay
M012106

Guernsey
M012107

Firth of Lorn, Oban Bay
M012108

Firth of Lorn, Oban Bay
M012109


M012110


M012111


M012112


M012113


M012114
Nucula nucleus (Linnaeus, 1758)
''
NMW Image No.

Nucula nucleus (Linnaeus, 1758)

Nuculoidea : Nuculidae
Tebble name: Nucula nucleus (Linnaeus)
Smith & Heppell name: Nucula nucleus (L., 1758)

To size: To 12mm. Shell Structure: Solid. Equivalve: Equivalve. Equilateral: Inequilateral, the beaks lie approximately 25-30% of dorsal margin length from posterior. Tumidity: Moderately tumid. Outline: Rounded triangular: height of shell approximately 85% of length; antero-dorsal margin long, rounded, concave and sloping; postero-dorsal margin slightly concave to almost straight, steeply sloping with angled junction at posterior margin; anterior and posterior margins narrowly rounded; ventral margin more deeply rounded; escutcheon heart-shaped, slightly projecting, generally with defined edges in older individuals; lunule long, lanceolate with poorly defined edges.

Sculpture: Primary sculpture of numerous very fine, closely-spaced, radial riblets, most visible near the outer margin. Some comarginal lines and growth stops. Older individuals have a decussate surface near the outer margin. Margin: Inner margin crenulate in correspondence to riblets. Ligament: Internal, opisthodetic, with the ligament seated in a well-developed, rounded resilifer. A thin, barely visible, external ligament lies anterior to the beaks. Hinge: Taxodont: Broad and continuous hinge plate with a well-developed triangular shaped resilifer. Teeth long and pointed, usually 11-14 posterior and 16-25 anterior. The teeth extend across the top of the resilifer. Pallial Musculature: Pallial line continuous with no pallial sinus. Adductor muscle scars oval, more or less equal in size and indistinct. Periostracum: Smooth, matt surface, grey-green to olive coloured, very occasionally with orange or purple-grey coloured rays. Shells often coated with deposits of manganese, particularly around the posterior end. Colour: White. Inside of shell nacreous.



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Distribution & Ecology


Occurs all around the coasts of Britain and Ireland.

North-east Atlantic, Mediterranean, west Africa. Lives in sand, gravel, shell gravel and pebble, less often in silt or mud. Lives from the near sub-tidal to the outer continental shelf (180-200m depth).

Depth Range
Continental Shelf (to 200m)


Juveniles & Similar Species

Juvenile Description

Key Features & Similar Species

Additional Comments

Nuculoidea : Nuculidae

References


Listed are literature citing Nucula nucleus (Linnaeus, 1758). Reference containing the species Type Description is highlighted.
Allen J A 1954. A comparative study of the British species of Nucula and Nuculana. Journal of the Marine Biological Association of the United Kingdom. 33: 457-472.
Gofas S & Salas C 1996. Small Nuculidae (Bivalvia) with functional primary hinge in the adults. Journal of Conchology. 35: 427-435.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.

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