Yoldiella thaerella Killeen & Turner, 2009
Nuculanoidea : Nuculanidae
Equilateral, beaks located at midline.
Oval: antero- and postero-dorsal margins almost horizontal; anterior margin rounded with slight oblique truncation of the upper part; upper posterior margin slightly truncated obliquely (smaller specimens the upper posterior margin is rounded); lower posterior margin obliquely truncated or slightly flexuous; ventral margin long, deeply rounded, lowest point posterior of the midline. Umbo centrally placed, narrow, not prominent, projecting just above dorsal margin.
Sculpture: Very weak striations. Margin: Smooth. Ligament: Amphidetic, attached internally to the underside of the beak without a projecting chondrophore or resilifer. Relatively long and narrow. Hinge: Taxodont: Hinge plate characteristically weak, very narrow for the size of shell; blunt chevron-shaped teeth, up to 6-7 posterior and 5-6 anterior. Periostracum: Silky, pale straw coloured. Colour: Translucent white. Additional Characters: The hind-gut forms a rounded triangular shaped loop on the right side of the body, frequently with an indentation along the ventral side.
Distribution & Ecology
Western European Basin (including Rockall Trough) from latitudes of 43°N to 58°N, and at depths of 1719-4829m (most commonly in 2400-3000m), and in the North America Basin in depths of 1102-4400m.
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Additional Information & Related Species
Nuculanoidea : Nuculanidae
Listed are literature citing Yoldiella thaerella Killeen & Turner, 2009. Reference containing the species Type Description is highlighted.
Killeen I.J. & Turner J. 2009. Yoldiella and Portlandia (Bivalvia) from the Faroe-Shetland Channel and Rockall Trough, Northeast Atlantic. Journal of Conchology. 39 (6): 733-778.
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