Yoldiella fabula Allen, Sanders & Hannah, 1995
Nuculanoidea : Nuculanidae
Slightly inequilateral, the beaks lie 40-45% of dorsal margin length from anterior.
Elongate-oval- ‘bean-shaped’: dorsal margins gently curved and slightly crimped; anterior and posterior margins rounded; ventral margin long, shallowly rounded. Umbo relatively broad, prominent, projecting above the dorsal margin, situated posterior of midline.
Sculpture: Fine, regular striations, coarser towards the ventral margin. Margin: Smooth. Ligament: Slightly opisthodetic, attached internally to the underside of the beak without a projecting chondrophore or resilifer. Hinge: Taxodont: long, curved, relatively strong, v-shaped; 7-8 posterior and 8-9 anterior, chevron-shaped teeth on either side of the ligament. Periostracum: Silky, yellowish in colour. Colour: Translucent white. Additional Characters: The hind-gut forms a simple, rounded loop on the right side of the body.
Distribution & Ecology
Allen et al. (1995) record Y. fabula from most of the Atlantic deep-sea basins in depths ranging from 2503-5223m, including 2 stations in Rockall Trough.
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Abyssal Plain (4000m +)
Additional Information & Related Species
Nuculanoidea : Nuculanidae
Listed are literature citing Yoldiella fabula 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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