Left valve of Arcopagia crassa
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.
Arcopagia crassa
<em>Arcopagia crassa</em> (Pennant, 1777)
Right valve of Arcopagia crassa
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.
Right valve of Arcopagia crassa showing surface sculptue
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.
Inside of right valve of Arcopagia crassa showing pallial sinus
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.
Right valve of Arcopagia crassa showing pallial sinus
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.
Arcopagia crassa
Distribution and status
Not common. Found from the Norwegian Sea to the Iberian Peninsula.
The map provided here shows the distribution of the species based on Conchological Society data.
Ecology and behaviour
Burrows in muddy to coarse sand and shell gravel where it feeds on organic detritus picked up through the siphon.
Similar species
- Arcopella balaustina has a thinner more fragile shell
Key identification features
- Sculpture of think concentric ridges
- Margin of pallial sinus not confluent with pallial line
Taxon version key
[NBNSYS0000173926]
Sort order
10590
Taxonomic group
Marine bivalve
Solid, almost oval, shell up to about 6.5cm in length. Yellowish white or fawn in colour sometimes with pink or brown radiating streaks. Inside of shell white at the margins and often orange towards the centre. Deep, tongue shaped, pallial sinus. Sculpture of pronounced concentric ridges on valve surface.