Species Account

Panomya norvegica (Spengler, 1793)

Hiatelloidea : Hiatellidae

Tebble name: Panomya arctica (Lamarck)
Smith & Heppell name: Panomya arctica (Lamarck, 1818)

To size: To 80mm. Shell Structure: Solid. Equivalve: Subequivalve. RV a little larger. Equilateral: Subequilateral, beaks just in front of midline. Outline: Irregularly subquadrate; anterior dorsal sloping or continuous with broadly rounded anterior, posterior dorsal longer than anterior, almost straight, subparallel with straight or sinuous ventral margin; posterior subtruncate to truncate gaping widely.
Median area weakly sulcate set off by low rounded ridges from umbos to anterior ventral and posterior ventral margins.

Sculpture: Of irregular co-marginal lines and undulations. Margin: Inner margin smooth. Ligament: Ligament large, external, dark brown, about 1/3 length of posterior dorsal margin. Hinge: Hinge with a single prominent tooth in RV, corresponding socket in LV. Pallial Musculature: Posterior adductor scar elongate; pallial line wide, discontinuous. Periostracum: Periostracum light to dark brown continuing over large unretractable fused siphons. Colour: Shell dirty greyish white.

Distribution & Ecology

A deep burrower in mud and muddy sediments at shelf depths. Rarely found alive in recent times but taken from the North Sea as far south as Dogger Bank and from scattered localities off the west of Scotland.

Depth Range
Continental Shelf (to 200m)

Additional Information & Related Species

Related Species


Listed are literature citing Panomya norvegica (Spengler, 1793). Reference containing the species Type Description is highlighted.

Spengler L 1793. Beskrivelse over et nyt Slægt af de toskallede Konchylier, forhen af mig kaldet Chæna, saa og over det Linnéiske Slægt Mya, hvilket nøiere bestemmes, og inddeles i tvende Slægter . Skrivter af Naturhistorie-Selskabet. 3(1): 16-69, pl.2.


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Record last modified: 22/03/2016