Gibbomodiola adriatica (Lamarck, 1819)
Mytiloidea : Mytilidae
To size: To 50mm. Shell Structure: Thin, brittle. Equivalve: Equivalve. Equilateral: Strongly inequilateral, beaks very close to the anterior margin. Tumidity: A little inflated, umbos low. Outline: Modioliform, narrowly oblong; ligament margin straight sloping gently and angled with sloping and rather straight posterior dorsal margin; posterior rounded; ventral straight but a little sinuous and sloping upwards to narrowly rounded anterior margin.
var. ovalis more elongate with a less steeply sloping ligament margin.
Sculpture: Smooth with comarginal lines and growth stops. Margin: Smooth. Ligament: Deeply sunken extending for about 3/4 of the ligament margin. Hinge: Hinge plate narrow, smooth. Pallial Musculature: Obscure. Periostracum: Thin almost devoid of any bristles which if present are simple. Colour: Pale brown to golden brown often tinged pink and with a strong radial linear ray; internally white to pink some with a purple radial ray. Var. ovalis darker brown to black.
Distribution & Ecology
var. ovalis is restricted to the south coasts of Dorset and Cornwall.
Continental Shelf (to 200m)
Additional Information & Related Species
Mytiloidea : Mytilidae
Listed are literature citing Gibbomodiola adriatica (Lamarck, 1819). Reference containing the species Type Description is highlighted.
Lamarck J B P A de M 1819. Histoire naturelle des Animaux sans vertèbres 6. Paris. 6232pp.
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