Species Account

Astarte borealis (Schumacher, 1817)

Crassatelloidea : Astartidae

Tebble name: Astarte borealis Schumacher
Smith & Heppell name: Tridonta borealis Schumacher, 1817

To size: To 45 mm. Shell Structure: Solid. Equivalve: Equivalve. Equilateral: Sub-equilateral, beaks just in front of midline. Tumidity: Somewhat compressed. Outline: Subovate to subelliptical, slightly trigonal but beaks mostly eroded. Dorsal margins sloping steeply, lunule and escutcheon well developed both rather narrow. Anterior a little more broad and rounded than posterior.

Sculpture: Of dense co-marginal lines but obscured by the heavy periostracum. Margin: Inner margin smooth. Ligament: External, prominent as a raised band behind the beaks and extending about 1/2 length of escutcheon. Hinge: LV with 3 cardinal teeth, the posterior thin, a prominent "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 (3) cardinal teeth, a posterior "lateral" flange and an anterior "lateral" groove. Pallial Musculature: Pallial line impressed, entire; adductor scars impressed, oval, relatively large. Periostracum: Periostracum persistent, very thick, co-marginally striated, dark brown to almost black in colour. Colour: Shell white.

Distribution & Ecology

An arctic/subarctic species extending southward to Iceland, Faroes and Southern Norway but as subfossil shells only in the Northern North Sea.

Depth Range
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)

Additional Information & Related Species


Listed are literature citing Astarte borealis (Schumacher, 1817). Reference containing the species Type Description is highlighted.

Høpner Petersen G. 2001. Studies on some Arctic and Baltic Astarte species (Bivalvia, Mollusca). Bioscience. 52: 1-71.
Schumacher C F 1817. Essai d’un nouveau système des habitations des vers testacés Scultz, Copenhagen. 288pp, 22pls.


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Record last modified: 15/01/2014