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CERITHIOPSIDAE |
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Joculator hedleyi Laseron, 1951 Description: Shell medium size for the family, spire convex, last whorl constricted, greatest width at penultimate whorl. Variable in height/width ratio (Fig. 2). Protoconch unknown, broken in all available specimens. Teleoconch of up to 7 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 undulating, unbeaded cord level with top of aperture; base weakly concave with a weaker broad, low spiral cord. Outer lip of aperture expanded, thin; inner lip heavily calloused. Anterior canal a deep U-shaped notch. Colour light brown, becoming fawn in the aged syntypes. Size: Up to 5 mm in length. Distribution: Syntypes from "Above The Spit", Middle Harbour, NSW (i.e. upstream from The Spit). Additional material available (3 lots): Little Mosman Bay, Sydney Harbour; The Spit, Middle Harbour; Arrawarra, N. of Woolgoolga, NSW. Habitat: Intertidal. Remarks: None of the syntypes or other specimens has a protoconch. The specimens shown in Fig. 2 are the extremes in shape from a lot of 25 specimens, showing the variation in height to width ratio of the species. Fig. 1: Middle Harbour above The Spit, NSW (C.102700 SYNTYPE) Fig. 2: Little Mosman Bay, NSW (C.unreg) |
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