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Dentimargo allporti (Tenison-Woods, 1876) Diagnosis: Shell small to medium, white, occasionally with three pale fawn bands; biconic, strongly constricted anteriorly; spire medium to tall; aperture broad; lip regularly curved, only slightly thickened internally, smooth or denticulate, without a strong posterior denticle; external varix present; siphonal notch absent; posterior notch absent; columella with four strong plaits occupying more than half the aperture. Size: Adults 5-9 mm in length. Distribution: Australian
Museum Collection: Port Stephens, NSW, to Comparison: This species is identified by being constricted anteriorly, with the lip usually denticulate but little thickened internally. Synonymy: Volvarinella difficilis Gabriel, 1962 (Hewish in Wilson, 1994). Remarks: Fig. 1 shows two specimens from the same sample from off North Head, Sydney; fig. 2 shows specimens from off King Is., Bass Strait. The Bass Strait specimens match the type illustration closely, but the NSW specimens are much more elongate. Fig. 1: North Head, Sydney (C.312271) Fig. 2: Off King Island, Bass Strait, Tasmania (C.312322)
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