Astarte montagui (Dillwyn, 1817)
Crassatelloidea : Astartidae
To size: To 15mm. Shell Structure: Relatively solid. Equivalve: Equivalve. Equilateral: Very slightly inequilateral, the beaks lie approximately 45% of dorsal margin length from anterior. Tumidity: Moderately tumid. Outline: Broadly rounded triangular, width of shell more or less the same as the height. Posterior dorsal margin gently sloping, gently rounded and slightly convex; anterior dorsal margin more steeply sloping and slightly concave; anterior and posterior ends rounded; ventral margin deeply rounded; lunule distinct, elongate heart-shaped with moderately well defined, slightly raised edges; escutcheon distinct, lanceolate, with well defined slightly raised edges. Beaks prosogyrous.
Sculpture: Broad, concentric, strap-like ridges, over 40 in adult individuals. Margin: Smooth. Ligament: Broad, distinct but not prominently raised, runs for approximately half the length of the escutcheon. Hinge: Heterodont: Robust hinge plate; right valve with 2 solid, blunt cardinal teeth, the posterior tooth is thin and the anterior tooth is very broad; left valve with 3 blunt cardinal teeth, the 2 anterior teeth are relatively broad and solid whereas the posterior cardinal in very thin and not prominent. Pallial Musculature: Entire. Periostracum: Ranges from yellowy brown to dark brown. Silky surface texture with microscopic, rounded oval pits. Colour: White.
Distribution & Ecology
Lives in clean and silty sands and gravels from the near sub-littoral (intertidal on some sheltered coasts) towards the outer shelf, depth range c.5m - >150m.
Continental Shelf (to 200m)
Additional Information & Related Species
Crassatelloidea : Astartidae
Listed are literature citing Astarte montagui (Dillwyn, 1817). Reference containing the species Type Description is highlighted.
Dillwyn L W 1817. A Descriptive Catalogue of Recent Shells arranged according to the Linnaen method with particular attention to the synonymy London. 580pp.
Høpner Petersen G. 2001. Studies on some Arctic and Baltic Astarte species (Bivalvia, Mollusca). Bioscience. 52: 1-71.
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