Species Account

Ledella pustulosa (Jeffreys, 1876)

Nuculanoidea : Nuculanidae

Tebble name: n/a
Smith & Heppell name: Ledella pustulosa (Jeffreys, 1876)

Notes on Nomenclature

Nuculanidae in place of Yoldiidae
Killeen & Turner (2009) use Nuculanidae instead of Yoldiidae in agreement with Ockelmann & Warén (1998) who explan that the distinguishing characters between these two families has never been well documented. Until the Yoldiidae can be clearly distinguished from the Nuculanidae we shall treat them under the single family Nuculanidae.

To size: To 6mm. Shell Structure: Moderately solid. Equivalve: Equivalve. Equilateral: Slightly inequilateral, beaks just in front of midline, approximately 45% of total length from anterior end. Tumidity: Tumid. Outline: Oval with a short rostrum: shell height approximately 65-70% of length; antero-dorsal margin straight to slightly convex; postero-dorsal margin almost straight to gently sloping; rostrum broadly rounded; postero-ventral margin flexuous; ventral margin deeply rounded. Umbo relatively broad and prominent, projecting above the dorsal margin.

Sculpture: Fine, irregular concentric lines and radial lines which vary in prominence. Margin: Smooth. Ligament: Internal, amphidetic, oval, seated in a relatively broad resilium beneath the beaks. Hinge: Taxodont: Hinge plate relatively solid and broad, becoming broader away from the beaks; robust, blunt, short chevron-shaped teeth, approximately 10-12 either side of the ligament. Periostracum: Silky to slightly glossy, greyish to straw-coloured covered with pustules or blisters. Colour: Translucent white. Additional Characters: The hind-gut forms a series of simple, rounded loops on the left and right side of the body.

Distribution & Ecology

Widely distributed in the northeast Atlantic deep sea basins and on the lower continental slope in depths ranging from approximately 1000-2500m.

Depth Range
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)

Additional Information & Related Species


Listed are literature citing Ledella pustulosa (Jeffreys, 1876). Reference containing the species Type Description is highlighted.

Jeffreys J G 1876. New and peculiar Mollusca of the Pecten, Mytilus and Arca families, procured in the Valorous expedition. Annals and magazine of natural History. (4)18: 424-436.
Olabarria C. 2005. Patterns of bathymetric zonation of bivalves in the Porcupine Sea Bight and adjacent abyssal plain, NE Atlantic. Deep-Sea Research I. 52: 15-31.


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Record last modified: 22/03/2016