Outside of right valve
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected from Penzance. Length = 9mm.
Musculus costulatus
<em>Musculus costulatus</em> (Risso, 1826)
Outside of left valve
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected from Penzance. Length = 9mm.
Outside of right valve
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected from Penzance. Length = 9mm.
Outside of left valve
Species
Photographer / copyright holder
Steve Wilkinson
Specimen collected from Penzance. Length = 9mm.
Musculus costulatus
Distribution and status
Distributed from the south Britain to the Iberian Peninsula and into the Mediterranean.
Ecology and behaviour
Lives amongst algae and stones disguised with fragments of shell or gravel mixed up with the byssus threads. Feeds by filtering phytoplankton.
Key identification features
- There are 8-10 anterior ribs and 20-30 posterior ones.
- Periostracum is light green
Taxon version key
[NBNSYS0000176547]
Sort order
9390
Taxonomic group
Marine bivalve
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Brittle shell up to 1.5cm in length. It is dirty white in colour marked with purple brown streaks. The inside of the shell is pearly and sometimes dark brown. The surface of the shell is sculptured with fine concentric lines and ribs in the anterior and posterior region of the shell. The margin is crenulate where there are aribs but smooth elsewhere.