Yoldiella insculpta (Jeffreys, 1879)
Nuculanoidea : Nuculanidae |
| Tebble name: | n/a |
| Smith & Heppell name: | Yoldiella insculpta (Jeffreys, 1879) |
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 3.6mm.
Shell Structure:
Thin, fragile.
Equivalve:
Equivalve.
Equilateral:
Almost equilateral, beaks at midline or very slightly behind the midline.
Tumidity:
Moderately inflated.
Outline:
Oval; postero- and antero-dorsal margins short, horizontal; posterior and anterior margins broadly rounded; ventral margin deeply rounded. Umbo broad, prominent above the dorsal margin, located at, or very slightly anterior of the midline.
Sculpture:
Fine, regular, well-defined concentric striations, faint radial striations are present (particularly on the posterior end) in some larger individuals.
Margin:
Smooth.
Ligament:
Amphidetic, small, rounded, projecting slightly below the hinge plate, attached internally to the underside of the beak without a projecting chondrophore or resilifer.
Hinge:
Taxodont: relatively long, narrow, slightly curved, 8-12 small chevron-shaped teeth on either side of the ligament.
Periostracum:
Silky.
Colour:
Translucent white.
Additional Characters:
The hind-gut lies on both sides of the body and forms three tight coils on the right side and two on the left.
.
Distribution & Ecology
West European Basin, mostly from a small geographic area around 47°30’N, 08°40’W in depths from 1913-2360m, and in the Canaries Basin in depths from 1934-3301m.
Depth Range
Bathyal (500 - 2000m)
Additional Information & Related Species
Related Species
Nuculanoidea : Nuculanidae
References
Listed are literature citing Yoldiella insculpta (Jeffreys, 1879). Reference containing the species Type Description is highlighted.
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Allen, J.A., Sanders, H.L. & Hannah, F. 1995. Studies on the deep-sea Protobranchia (Bivalvia); the subfamily Yoldiellinae. Bulletin of the British Museum of Natural History. 61: 11-90. |
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Jeffreys J.G. 1879. On the Mollusca procured during the ‘Lightning’ and ‘Porcupine’ Expeditions, 1868-70. (Part II). Proceedings of the Zoological Society of London. 1879: 553-588. |
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Killeen I.J. & Turner J. 2009. Yoldiella and Portlandia (Bivalvia) from the Faroe-Shetland Channel and Rockall Trough, Northeast Atlantic. Journal of Conchology. 39 (6): 733-778. |
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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