Hiatella arctica (Linnaeus, 1758)
Hiatelloidea : Hiatellidae
Brittle rather thin.
Inequilateral beaks close to the anterior.
Trapezoidal - modioliform; anterior greatly reduced, umbos prominent; anterior dorsal margin sloping steeply, straight or concave to narrowly rounded anterior ventral; ventral margin long, straight or sinuous; Posterior dorsal margin long diverging from ventral margin to give a broad curved or subtruncate posterior. Posterior area set of by an angular umbonal posterior ventral ridge.
Sculpture: Of irregular co-marginal ridges and lines; posterior area with two radial ribs usually ornamented with short hollow spines. Margin: Inner margin smooth. Ligament: External, sunken, about 1/4 length of posterior dorsal margin. Hinge: Hinge teeth usually worn but RV with a single peg-like cardinal; LV with two similar cardinals. Pallial Musculature: Adductor scars unequal, posterior slightly the larger; pallial line fragmented, pallial sinus deep. Periostracum: Persistent, straw coloured. Colour: Shell white.
Distribution & Ecology
Continental Shelf (to 200m)
Continental Margin Zone (200 - 500m)
Additional Information & Related Species
Key Features & Similar Species
Hiatelloidea : Hiatellidae
Listed are literature citing Hiatella arctica (Linnaeus, 1758). Reference containing the species Type Description is highlighted.
Linnaeus C 1758. Systema Naturae. Editio decima. 1. Regnum Animale Holmiae, Laurentii Salvii. 824pp.
Russell Hunter W. 1949. The structure and behaviour of “Hiatella gallicana” (Lamarck) and “H. arctica” (L.) with special reference to the bring habit. Proceedings of the Royal Society of Edinburgh. LXIII Part III (No. 19): 271-289.
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