Thyasira scotiae Oliver & Drewery, 2014
Thyasiroidea : Thyasiridae
To size: To 20mm. Shell Structure: Rather thin, fragile, transluscent. Equivalve: Equivalve. Equilateral: Equilateral. Tumidity: Rather tumid. Outline: Subcircular, height and length more or less equal, umbos prosogyrate, lunule margin concave, relatively short; posterior margin weakly bisinuate; ventral and anterior broadly rounded. Posterior dorsal area weakly bisulcate; submarginal sulcus shallow demarcating a long low auricle; posterior sulcus shallow. Lunule distinct as a smooth area defined by change in sculpture but lacking any defining ridge or groove.
Sculpture: Of weak undulations, fine commarginal lines and occasional raised threads especially over posterior and anterior areas. Margin: Inner margin smooth. Ligament: Ligament deeply sunken not rising above the shell margin; relatively short "ligament/MaxD" = 0.30. Hinge: Lacking teeth. Pallial Musculature: Muscle scars indistinct, hardly visible in most shells; anterior adductor scar elongate separated from the pallial line for over half its length. Periostracum: Very thin, transparent. Colour: Shell off white.
Distribution & Ecology
Bathyal (500 - 2000m)
Additional Information & Related Species
Key Features & Similar Species
Thyasiroidea : Thyasiridae
Listed are literature citing Thyasira scotiae Oliver & Drewery, 2014. Reference containing the species Type Description is highlighted.
Oliver P.G. & Drewery J. 2014. New species of chemisymbiotic clams (Bivalvia: Vesicomyidae and Thyasiridae) from a putative ‘seep’ in the Hatton-Rockall Basin, north-east Atlantic.. Journal of the Marine Biological Association of the United Kingdom. 94 (2): 389-403.
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