Nucula hanleyi Winckworth, 1931
Nuculoidea : Nuculidae |
| Tebble name: | Nucula hanleyi Winckworth |
| Smith & Heppell name: | Nucula hanleyi Winckworth, 1931 |
To size:
To 18mm.
Shell Structure:
Solid.
Equivalve:
Equivalve.
Equilateral:
Conspicuously inequilateral, the beaks lie approximately 15% of dorsal margin length from posterior.
Tumidity:
Slightly compressed.
Outline:
Ovate triangular: height of shell approximately 80% of length; antero-dorsal margin very long, gently curved and sloping; postero-dorsal margin almost straight, steeply sloping with angled junction at posterior margin; anterior and ventral margins moderately rounded; escutcheon elongate heart-shaped, slightly projecting, generally with defined edges in older individuals; lunule long, lanceolate with poorly defined edges, barely raised.
Sculpture:
Primary sculpture of numerous very fine, closely-spaced, radial riblets, most visible near the outer margin. Some concentric lines and growth stops. Older individuals may have a slightly decussate surface near the outer margin.
Margin:
Inner margin crenulate in correspondence to riblets.
Ligament:
Internal, opisthodetic, with the elongate pyriform ligament seated in a well-developed resilifer. A thin, barely visible, external ligament lies anterior to the beaks.
Hinge:
Taxodont: Broad and continuous hinge plate with a well-developed resilifer. Teeth long and pointed, usually 12-14 posterior and 22-27 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, silky to matt surface, grey-green to olive coloured, sometimes darker brown, very frequently with orange or reddish coloured rays, purple grey lines or narrow bands. Darker concentric bands may be present. Shells sometimes speckled with deposits of manganese around the posterior end.
Colour:
White. Inside of shell nacreous.
Distribution & Ecology
Depth Range
Continental Shelf (to 200m)
Additional Information & Related Species
Related Species
Nuculoidea : Nuculidae
References
Listed are literature citing Nucula hanleyi Winckworth, 1931. Reference containing the species Type Description is highlighted.
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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. |
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Gofas S & Salas C 1996. Small Nuculidae (Bivalvia) with functional primary hinge in the adults. Journal of Conchology. 35: 427-435. |
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Winckworth R 1931. On Nucula nitida. Proceedings of the Malacological Society of London. 20: 280-281. |
Resources
- 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.
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