Thyasira dunbari Lubinsky, 1976
Thyasiroidea : Thyasiridae
To size: To 6mm. Shell Structure: Thin shelled. Equivalve: Equivalve. Equilateral: Equilateral (large shells becoming expanded anteriorly). Tumidity: Moderate. Outline: Rhomboidal; anterior dorsal margin sloping steeply, rather long and with a short truncation before the anterior junction; ventral rounded, posterior weakly biangulate but scarcely sinuous; posterior subacute; posterior dorsal slope rather straight and angled close to the beak. Contour: Posterior area flattened, in some weakly sunken; auricle absent, submarginal sulcus distinct margin sharp.
Sculpture: Smooth with growth lines and stops only. Margin: Inner margin smooth. Ligament: External, deeply sunken about half the length of submarginal sulcus. Hinge: Hinge plate narrow lacking distinct teeth but some with cardinal thickening in RV. Pallial Musculature: Muscle scars obscure. Periostracum: Not persistent. Colour: Shell white. Additional Characters: 2 demibranchs.
Distribution & Ecology
Continental Shelf (to 200m)
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Additional Information & Related Species
Thyasiroidea : Thyasiridae
Listed are literature citing Thyasira dunbari Lubinsky, 1976. Reference containing the species Type Description is highlighted.
Lubinsky I 1976. Thyasira dunbari n. sp. (Bivalvia: Thyasiridae) from the Canadian Arctic Archipelago. Journal of the Fisheries Research Board of Canada. 33: 1667-1670.
Oliver P G & Killeen I J 2002. The Thyasiridae (Mollusca: bivalvia) of the British continental shelf and North Sea Oilfields. Studies in Marine Biodiversity and Systematics from the National Museum of Wales. BIOMOR Reports. 3: 1-73.
Payne C.M. & Allen J.A. 1991. The morphology of deep-sea Thyasiridae (Mollusca: Bivalvia) from the Atlantic Ocean. Philosophical Transactions of the Royal Society of London Series B. 334: 481-566.
Włodarska-Kowalczuk M 2007. Molluscs in Kongsfjorden (Spitsbergen, Svalbard): a species list and patterns of distribution and diversity. Polar Research. 26: 48-63.
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