Yoldiella incala Allen, Sanders & Hannah, 1995
Nuculanoidea : Nuculanidae
Moderately inequilateral, the beaks lie approximately 40% of dorsal margin length from anterior.
Elongate-oval: dorsal margin crimped either side of the umbo, dipping down to give a small notch; postero-dorsal margin long, straight (or slightly concave), gently sloping with a dorsal margin – posterior margin junction; antero-dorsal margin shorter and gently sloping; lower posterior margin obliquely truncated, weakly rostrate in larger specimens; anterior margin broadly rounded; ventral margin long, deeply rounded. Umbo relatively narrow, but prominent, projecting just above the dorsal margin, situated anterior of midline.
Thin, laterally compressed.
Sculpture: Weak striations. Margin: Smooth. Ligament: Amphidetic, attached internally to the underside of the beak without a projecting chondrophore or resilifer. Relatively short. Hinge: Taxodont: long, v-shaped with up to 8 well-developed chevron-shaped teeth on either side of the ligament. Periostracum: Silky, pale straw-coloured. Colour: Translucent white. Additional Characters: The hind-gut forms a simple, rounded loop on the right side of the body.
Distribution & Ecology
Western European Basin (including Rockall Trough) from latitudes of 44°N to 58°N, and at depths of 1913-2170m.
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Additional Information & Related Species
Nuculanoidea : Nuculanidae
Listed are literature citing Yoldiella incala Allen, Sanders & Hannah, 1995. Reference containing the species Type Description is highlighted.
Allen, J.A., Sanders, H.L. & Hannah, F. 1995. Studies on the deep-sea Protobranchia (Bivalvia); the subfamily Yoldiellinae. Bulletin of the British Museum of Natural History. 61: 11-90.
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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