Yoldiella valorousae Killeen & Turner, 2009
Nuculanoidea : Nuculanidae |
| Tebble name: | n/a |
| Smith & Heppell name: | n/a |
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 4.4mm.
Shell Structure:
Thin, fragile.
Equivalve:
Equivalve.
Equilateral:
Moderately inequilateral, the beaks lie approximately 40% of dorsal margin length from anterior.
Tumidity:
Slightly tumid.
Outline:
Elongate-oval: postero-dorsal margin long, gently sloping; antero-dorsal margin sloping more steeply; posterior margin broadly rounded; anterior margin rounded with the extremity situated above the horizontal midline; ventral margin deeply rounded, lowest point posterior of midline. Umbo small, not prominent, projecting just above the dorsal margin, and lies anterior of midline.
Sculpture:
Very weak concentric striations.
Margin:
Smooth.
Ligament:
Amphidetic, attached internally to the underside of the beak without a projecting chondrophore or resilifer. Relatively short.
Hinge:
Taxodont: Hinge long, narrow with 8-10 posterior and 7-9 anterior, chevron-shaped, teeth on either side of the ligament.
Pallial Musculature:
Posterior adductor muscle scar rounded.
Periostracum:
Silky, pale straw coloured.
Colour:
Translucent white.
Additional Characters:
The hind-gut lies on the right side of the body. It runs along the antero-dorsal margin then clockwise up towards the umbo then turning anticlockwise and then back on itself.
Distribution & Ecology
Western European Basin from latitudes of 43°N to 58°N, and at depths of 1491-3220 m. Also known from the Canaries and Sierra Leone Basins.
Depth Range
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Additional Information & Related Species
Related Species
Nuculanoidea : Nuculanidae
References
Listed are literature citing Yoldiella valorousae Killeen & Turner, 2009. Reference containing the species Type Description is highlighted.
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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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