Thracia gracilis Jeffreys, 1865
Thracioidea : Thraciidae |
| Tebble name: | n/a |
| Smith & Heppell name: | n/a |
To size:
To 40mm.
Shell Structure:
Brittle.
Equivalve:
Inequivalve, RV more convex than LV.
Equilateral:
Inequilateral, beaks behind midline.
Outline:
Oval, anterior part longer and higher than posterior, dorsal anterior margin almost straight almost parallel to ventral margin to narrowly curving anterior margin. Ventral margin, which is straight. Posterior is rostrate, truncate.
Sculpture:
Concentric lines, ridges with coarse granulations on posterior part (rostrum), remainder of shell finely granulated.
Ligament:
External and internal: External short, behind beaks; internal thick in a narrow, elongated, triangular resilifer below external.
Hinge:
Lithodesma broken off.
Pallial Musculature:
Angular, almost triangular to where lithodesma would be. Not confluent.
Periostracum:
Yellowish brown.
Colour:
Cream.
Distribution & Ecology
Inhabits muddy sand at outer shelf depths.
Depth Range
Continental Shelf (to 200m)
Additional Information & Related Species
Additional Comments
Related Species
Thracioidea : Thraciidae
References
Listed are literature citing Thracia gracilis Jeffreys, 1865. Reference containing the species Type Description is highlighted.
|
Jefffreys J G 1865. British Conchology, vol. 3 Van Voorst, London. 394pp. |
|
Soot-Ryen T 1941. Northern Pelecypods in the collection of Tromsø Museum I Order Anomalodesmacea Families Pholoadomyidae. Thraciidae and Periplomatidae. Tromsø Museums Arshefter Naturhistorisk Avd. Nr. 17. 61: 1-41, 10 pls. |
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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