Bathyarca philippiana (Nyst, 1848)
Arcoidea : Arcidae |
| Tebble name: | n/a |
| Smith & Heppell name: | Bathyarca philippiana (Nyst, 1848) |
To size:
To 10mm.
Shell Structure:
Thin but not fragile, opaque.
Equivalve:
Slightly inequivalve, left valve slightly larger, right valve sitting inside left valve.
Equilateral:
Inequilateral, beaks in front of midline at about 1/3 the length of the dorsal margin from the anterior.
Tumidity:
A little tumid.
Outline:
Oblong, posteriorly expanded, umbos prominent; dorsal margin long, straight; posterior broadly rounded, ventral straight or gently curved mostly with a slight byssus indentation; anterior much narrower than posterior rounded.
Contour:
Dorsal area narrow, flat; posterior angle rounded; median area with a shallow sinus most distinct in smaller shells.
Sculpture:
Primarily radial of numerous fine riblets, these interrupted by growth stops. Everywhere with short thin erect scales arising from the riblets, these strongest over posterior area and persisent mostly around the margins; when worn appears weakly nodulose.
Margin:
Inner margin of larger left valve weakly crenulate adjacent to a submarginal groove; right valve smooth.
Ligament:
Duplivincular, chevrons developing from the posterior of the dorsal area.
Hinge:
Taxodont, strong teeth in two series set on a gently curved hinge plate; no or little edentulous space between series; anterior set with up to 8 teeth, posterior set up to 14; all set slightly oblique.
Pallial Musculature:
Anterior adductor scar about 2/3 size of posterior.
Periostracum:
Of fragile straw coloured bristles arranged in radial rows especially over the posterior and anterior slopes, forming comarginal frills medially; posterior slope bristles much longer than those elsewhere.
Colour:
White.
Distribution & Ecology
Depth Range
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Additional Information & Related Species
Key Features & Similar Species
Related Species
Arcoidea : Arcidae
References
Listed are literature citing Bathyarca philippiana (Nyst, 1848). Reference containing the species Type Description is highlighted.
|
Nyst P H J 1848. Tableau synoptique et synonymique des espèces vivantes et fossiles de la familie des Arcacées. pt. 1 Genre Arca. Mémoires de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. 22: 1-79. |
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Oliver G & Allen J A 1980. The Functional and Adaptive Morphology of the Deep-Sea Species of the Arcacea (Mollusca: Bivalvia) from the Atlantic. Philosophical Transactions of the Royal Society of London Series B. 291: 45-76. |
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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