Astarte crenata (J E Gray, 1824)Crassatelloidea : Astartidae
Subequilateral, beaks just in front of midline.
A little compressed.
Subovate, a little trigonal. Lunule margin concave. Anterior rounded and narrower than roundly truncated posterior.
Sculpture: 25-35 co-marginal ribs, these somewhat excavated dorsally but fading marginally and over the posterior. Margin: Smooth (may not be consistent). Ligament: External, a short but prominent arched band posterior of the beaks. Hinge: LV with 3 cardinal teeth, the posterior thin, a "lateral" flange and groove are present above the posterior adductor scar; a small "lateral" ridge is present above the anterior adductor scar. RV with 2 cardinal teeth, a posterior "lateral" flange and an anterior "lateral" groove. Pallial Musculature: Pallial line entire; adductor scars large of equal size. Periostracum: Persistent, olive brown to brown. Co-marginally wrinkled, microscopically punctate. Colour: Shell white.
Distribution & Ecology
A northern species found only in the north of the study area in the Shetland islands, Faroes, Iceland and Norway to shelf depths.
Continental Shelf (to 200m)
Juveniles & Similar Species
Key Features & Similar Species
Jensen (1912) and Ockelmann (1958) considered A. crebricostata to be a subspecies of A. crenata. The material of both species that we have examined share the wrinkled periostracum and overall appearance. The slight differences in outline and nature of the inner margin are not conclusive but we retain them as separate (following CLEMAM) until further research is done.
Listed are literature citing Astarte crenata (J E Gray, 1824). Reference containing the species Type Description is highlighted.
Gray J E 1824. Shells. In: Parry W.E. (ed.) Supplement to Appendix, Parry's Voyage for the Discovery of a north-west passage in the years 1819-1820, containing an account of the subjects of Natural History London, John Murray. Appendix 10, Zool: 240-246.
Høpner Petersen G. 2001. Studies on some Arctic and Baltic Astarte species (Bivalvia, Mollusca). Bioscience. 52: 1-71.
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