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CERITHIOPSIDAE |
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Joculator nanus Laseron, 1951 Description: Shell very small for the family, spire strongly convex, last whorl constricted, greatest width at penultimate whorl. Protoconch of one whorl, smooth. Teleoconch of up to 4½ nearly straight sided whorls with impressed suture; whorls with 3 spiral cords crossed by weaker axial ribs, forming strong nodules at intersections. Last whorl with a more weakly beaded cord level with top of aperture; base weakly concave with an irregular unbeaded spiral cord. Outer lip of aperture expanded, thin; inner lip heavily calloused. Anterior canal a deep U-shaped notch. Colour mid-brown. Size: Up to 2.0 mm in length. Distribution: Syntypes dredged in 8 fathoms (14.6 m) at Dolls Point, Georges River, Sydney. Additional material available (2 lots): Dolls Point, Georges River in 14.6 m; Terrigal. Habitat: Habitat and abundance unknown. Comparison: This species is distinguished from the other three species in the genus by its protoconch of only one whorl. Figs. 1, 2: Dolls Point, Georges River, Sydney in 8 fathoms (C.102709 SYNTYPE) |
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