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Stephopoma tricuspe Mörch, 1861 Description: Shell irregularly spiral, or contorted, surface with very coarse and irregular growth ridges. No longitudinal sculpture. No slit. Colour dirty white. Size: Specimens available up to 30 mm, tube outside diameter 4 mm. Distribution: Recorded only from Sydney Harbour. Habitat: Unknown. Comparison: Distinguished within the family by absence of a longitudinal slit. Remarks: There are only two lots of this species in the Australian Museum, both of which are figured here. Hedley (1913) gives a figure of the shells and operculum of specimens in the British Museum "perhaps types". Bieler (1997) discusses this species, and figures the protoconch and opercular bristles. Fig. 1: Sydney Harbour, dredge Triton (C.407601) Fig. 2: Port Jackson, NSW (C.407561) |
