Nucula tumidula Malm, 1861
Nuculoidea : Nuculidae |
| Tebble name: | n/a |
| Smith & Heppell name: | Nucula tumidula (Malm, 1860) |
To size: To 7 mm. 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, curved and sloping with an angle at the junction with the anterior end; postero-dorsal margin slightly 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, with poorly defined edges; lunule lanceolate, not raised with poorly defined edges; umbo rather flattened, not prominent.
Sculpture: Very finely decussate, sculpture of well defined, closely, but irregularly spaced, raised concentric lines which increase in prominence towards the outer margin, and numerous, very fine closely-spaced, radial riblets. Margin: Inner margin crenulate in correspondence to riblets. Ligament: Internal, opisthodetic, rounded triangular 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 triangular shaped resilifer. Teeth long and pointed, usually 5-7 posterior and 11-14 anterior. The teeth extend across the top of the resilifer. Pallial Musculature: Pallial line continuous with no pallial sinus. Periostracum: Slightly glossy, grey green to olive; periostracum and shell often eroded at the umbo. Colour: White. Inside of shell nacreous.
Distribution & Ecology
Depth Range
Bathyal (500 - 2000m)
Additional Information & Related Species
Related Species
Nuculoidea : Nuculidae
References
Listed are literature citing Nucula tumidula Malm, 1861. Reference containing the species Type Description is highlighted.
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Malm A W 1861. Raekke af fiske, krebsdjur og bloddjur, som ere nye for den Skandinaviske fauna. Skandinaviske Naturforskeres 8de møde i Kjøbenhavn 1860, Forhandlingar. 1860: 616-624. |
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Salas C. 1996. Marine Bivalves from off the Southern Iberian Peninsula collected by the Balgim and Fauna 1 expeditions. Haliotis. 25: 33-100. |
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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