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.
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)
Copyright Des Beechey 2003