 Shellness, Kent, England, UK, NE Atlantic M010345 |
 Shellness, Kent, England, UK, NE Atlantic M010346 |
 Shellness, Kent, England, UK, NE Atlantic M010347 |
 Shellness, Kent, England, UK, NE Atlantic M010348 |
 Reculvers[?] M010564 |
 Reculvers[?] M010565 |
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NMW Image No.
Petricola pholadiformis Lamarck, 1818
Veneroidea : Petricolidae| Tebble name: | Petricola pholadiformis Lamarck |
| Smith & Heppell name: | Petricola pholadiformis Lamarck, 1818 |
To size: To 64mm. Shell Structure: Thin, fragile shell. Equivalve: Equivalve. Equilateral: Inequilateral. Beaks in front of midline. Tumidity: Not tumid. Outline: Elongate oval. Lunule not well-developed. Radiating ridges distinguish it from rest of shell. Escutcheon absent.
Sculpture: Radial ribs which, in the anterior, are developed into rib-like lamellae at the concentric lines. Margin: Smooth. Ligament: Inset, but highly visible, chesnut brown in colour. Runs almost to the end of the dorsal margin. Hinge: 3 cardinals in LV, the central is bifid and hooks from under the umbo, not on hinge plate. 2 cardinals in RV, posterior is bifid, the anterior originates beneath umbo and is hook-like. Pallial Musculature: Pallial sinus deep, extending past the midline. Periostracum: Thin, matt. Colour: White/cream.
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Distribution & Ecology
Petricola pholadiformis was introduced not later than 1890 (Naylor 1957) and found in the River Crouch, Essex International Council for the Exploration of the Sea; 1972, Tebble 1976).
The species is native to the USA and was introduced from there. It is established along south and east coasts of England from Lyme Regis, Dorset, to the Humber, Humberside (Duval 1963; J. Light & I. Killeen pers. comm.), where it is found living in clay, peat or soft rock shores. It is most common off Essex and the Thames estuary e.g. the River Medway (see Bamber 1985). European populations occur from southern Norway to the Mediterranean and Black Seas (Tebble 1976).
Atlas shows records from other locations outside range shown on map.but IJK does not think that these are established. Bores into hard clay, chalk, stiff mud, peat-moss or limestone.
Depth Range
Intertidal
Juveniles & Similar Species
Juvenile Description
Key Features & Similar Species
Additional Comments
References
Listed are literature citing Petricola pholadiformis Lamarck, 1818. Reference containing the species Type Description is highlighted.
|
Lamarck J B P A de M 1818. Histoire naturelle des Animaux sans vertèbres 5. Paris. 612pp. |
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Purchon, R D 1955. The functional morphology of the rock-boring lamellibranch Petricola pholadiformis Lamarck. 34: 257-278. |
Resources
Downloads
Weblinks
- 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.