Arcopagia crassa

<em>Arcopagia crassa</em> (Pennant, 1777)

Left valve of Arcopagia crassa

Submitted by Steve Wilkinson on Fri, 01/01/2010 00:00

Species

Arcopagia crassa

Photographer / copyright holder

Steve Wilkinson

Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.

Right valve of Arcopagia crassa

Submitted by Steve Wilkinson on Fri, 01/01/2010 00:00

Species

Arcopagia crassa

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

Submitted by Steve Wilkinson on Fri, 01/01/2010 00:00

Species

Arcopagia crassa

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

Submitted by Steve Wilkinson on Fri, 01/01/2010 00:00

Species

Arcopagia crassa

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

Submitted by Steve Wilkinson on Fri, 01/01/2010 00:00

Species

Arcopagia crassa

Photographer / copyright holder

Steve Wilkinson

Specimen collected by Celia Pain from St. Martins Flats Isle of Scilly. Length = 46mm.

Arcopagia crassa

Submitted by Steve Wilkinson on Sat, 05/12/2009 22:14

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

Read more about Arcopagia crassa

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.

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