Nuculana pernula (Müller, 1779)
Nuculanoidea : Nuculanidae |
| Tebble name: | n/a |
| Smith & Heppell name: | Nuculana pernula (Müller, 1779) |
Notes on Nomenclature
Killeen & Turner (2009) use Nuculanidae instead of Yoldiidae in agreement with Ockelmann & Warén (1998) who explan that the distinguishing characters between these two families has never been well documented. Until the Yoldiidae can be clearly distinguished from the Nuculanidae we shall treat them under the single family Nuculanidae.
To size:
To 28mm.
Shell Structure:
Thin, brittle.
Equivalve:
Equivalve.
Equilateral:
Inequilateral, the beaks lie approximately 65% of dorsal margin length from posterior.
Tumidity:
Moderately tumid.
Outline:
Elongate-oval with a long, truncated rostrum: antero-dorsal margin rounded and sloping, anterior end deeply rounded; postero-dorsal margin long and slightly concave, postero-ventral margin slightly concave; escutcheon indistinct, elliptical with scarcely defined edges, very slightly raised; lunule long, lanceolate, conspicuously raised with well defined, raised, moderately sharp edges (more rounded in older shells); a second well defined ridge radiates posteriorly to form the rostrum which has a rounded end.
Contour:
Rostrate.
Sculpture:
Fine, well defined, regularly-spaced raised concentric ridges, and coarser, irregular growth stops.
Margin:
Smooth.
Ligament:
Internal, opisthodetic, with a rounded triangular ligament seated in a well-developed resilifer.
Hinge:
Taxodont: relatively solid, continuous hinge plate, anterior part curved (convex), narrow below the beaks, broadening towards the anterior end. Posterior part long and concave. Hinge plate with a well-developed resilifer. Teeth, chevron-shaped, moderately long and pointed, usually 19 posterior and 16 anterior of the resilifer.
Pallial Musculature:
Pallial sinus shallow and indistinct.
Periostracum:
Silky, pale olive green to dark olive brown.
Colour:
White.
Distribution & Ecology
Depth Range
Continental Shelf (to 200m)
Continental Margin Zone (200 - 500m)
Additional Information & Related Species
Related Species
Nuculanoidea : Nuculanidae
References
Listed are literature citing Nuculana pernula (Müller, 1779). Reference containing the species Type Description is highlighted.
|
Müller O F 1779. Von zwoen wenig bekannten Muscheln, der Schinkenarche und der gerunzelten Mahlermuschel IV. Beschäftigungen der Berlinischen Gesellschaft naturforschender Freunde. 57. |
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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