Asperarca nodulosa (Müller, 1776)
Arcoidea : Arcidae |
| Tebble name: | n/a |
| Smith & Heppell name: | Bentharca nodulosa (Müller, 1776) |
To size:
To 15mm.
Shell Structure:
Solid opaque.
Equivalve:
Equivalve.
Equilateral:
Inequilateral, beaks at about 1/4 length of dorsal margin from anterior.
Tumidity:
Not inflated.
Outline:
Trapezoidal, posterior greatly expanded, umbos low; dorsal margin long, straight; posterior margin almost straight, sloping obliquely; ventral and anterior margins continuous gently curved or with a shallow sinus; anterior roundly pointed.
Contour:
Posterior angle prominent, rounded; median area flat or slightly concave; dorsal area narrow, flat.
Sculpture:
Strong of radial and comarginal ribs and ridges; comarginal dominant over median area intersected by radial and nodulose; posterior dominated by radial riblets these nodulose to spiny, anterior dominated by radial riblets these nodulose.
Margin:
Inner margin smooth.
Ligament:
Duplivincular, v-shaped ligament bands arising from posterior of dorsal area at first, then between beaks.
Hinge:
Taxodont, teeth, small, in two series separated by a short edentulous space, set on a narrow straight hinge plate; up to 7 anterior and 14 posterior teeth all angled obliquely.
Pallial Musculature:
Adductor scars unequal, anterior a little smaller than posterior.
Periostracum:
Thin, hyaline to pale straw coloured frills or bristles usually only persistent at margins.
Colour:
White, older shells brownish or greyish.
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 Asperarca nodulosa (Müller, 1776). Reference containing the species Type Description is highlighted.
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La Perna R 1998. On Asperarca Sacco, 1898 (Bivalvia, Arcidae) and two new Mediterranean species. Bollettino Malacologico. 33: 11-18. |
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Müller O F 1776. Zoologiae Danicae Prodromus, seu Animalium Daniae et Norvegiae Indigenarum, characteres, nomina, et synonyma imprimis popularum Havniae (Copenhagen): Typis Hallageriis. 281pp. |
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Olabarria C. 2005. Patterns of bathymetric zonation of bivalves in the Porcupine Sea Bight and adjacent abyssal plain, NE Atlantic. Deep-Sea Research I. 52: 15-31. |
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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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