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Nassaria problematica (Iredale, 1936)

Description: Whorls rounded, slightly concave below the suture. Axial sculpture of strong ribs, 8-11 on the body whorl. Spiral sculpture of numerous fine threads and several stronger ribs; 22-34 threads and 5-7 stronger ribs on the body whorl. Axial ribs nodulose at intersection of stronger spiral ribs, each axial usually with 2 nodules on spire whorls and 3 on the body whorl being most prominent. Outer lip with varix, denticulate within, stronger anteriorly. Columella smooth; anterior canal short, recurved. Colour cream externally, white internally. Operculum corneous, almost circular.

Size: Up to 40 mm in length.

Distribution: Endemic to Australia; Broomes Head, NSW, to Brush Island, NSW.

Habitat: Subtidal, in 128-548 meters, on a sandy mud and grey ooze substrate. Moderately common.

Figs. 1,2: Off Sydney in 280-370 fathoms (DLB3195)

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Copyright Des Beechey 2000