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Fissidentalium franklinae Lamprell & Healy, 1998

Description: Shape large, weakly curved. Weight solid. Aperture diameter up to 10 mm. Apex diameter 2.0 mm. Sculpture 35 narrow ribs at apex, increasing to approximately 90 at aperture; interspaces between ribs one quarter rib width. Transverse sculpture absent. Aperture circular. Colour white.

Size: Up to 90 mm in length.

Distribution: Global distribution unknown. Assumed to be endemic to Australia with a distribution from Cape York, Qld, southward to northern NSW.

Habitat: Dredged in sandy mud in 3661460 m (Lamprell & Healy, 1998). Uncommon.

Comparison: This species is similar to F. horikoshii in having numerous axial ribs and a fairly straight shell with relatively wide aperture, but the rib count at the aperture is higher at approximately 90.

Fig. 1: NE of Tweed Heads, NSW, in 366 m (C.169803).

 

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