Nuculana pernula (Müller, 1779)
Nuculanoidea : Nuculanidae
Inequilateral, the beaks lie approximately 65% of dorsal margin length from posterior.
Elongate-oval with a long, truncated rostrum: antero-dorsal margin rounded and sloping, anterior end deeply rounded; postero-dorsal margin long and slightly concave, postero-ventral margin slightly concave; escutcheon indistinct, elliptical with scarcely defined edges, very slightly raised; lunule long, lanceolate, conspicuously raised with well defined, raised, moderately sharp edges (more rounded in older shells); a second well defined ridge radiates posteriorly to form the rostrum which has a rounded end.
Sculpture: Fine, well defined, regularly-spaced raised concentric ridges, and coarser, irregular growth stops. Margin: Smooth. Ligament: Internal, opisthodetic, with a rounded triangular ligament seated in a well-developed resilifer. Hinge: Taxodont: relatively solid, continuous hinge plate, anterior part curved (convex), narrow below the beaks, broadening towards the anterior end. Posterior part long and concave. Hinge plate with a well-developed resilifer. Teeth, chevron-shaped, moderately long and pointed, usually 19 posterior and 16 anterior of the resilifer. Pallial Musculature: Pallial sinus shallow and indistinct. Periostracum: Silky, pale olive green to dark olive brown. Colour: White.
Distribution & Ecology
Continental Shelf (to 200m)
Continental Margin Zone (200 - 500m)
Additional Information & Related Species
Nuculanoidea : Nuculanidae
Listed are literature citing Nuculana pernula (Müller, 1779). Reference containing the species Type Description is highlighted.
Müller O F 1779. Von zwoen wenig bekannten Muscheln, der Schinkenarche und der gerunzelten Mahlermuschel IV. Beschäftigungen der Berlinischen Gesellschaft naturforschender Freunde. 57.
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