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Dentimargo kemblensis (Hedley, 1903)

Diagnosis: Shell small, white or fawn, biconic; spire tall; aperture moderately broad; lip thickened, smooth apart from one large denticle posteriorly; external varix present; siphonal notch absent; posterior notch absent; columella with four strong plaits occupying more than half the aperture.

Size: Holotype 5.5 mm in length.

Distribution: Unknown due to uncertainty of identification.  The type series is from  63-75 fathoms (115-137 m) off Port Kembla, NSW. Moderately common.

Comparison: Recognised by the biconic shape and single large denticle on the lip.

Synonymy: Marginella cuneata Laseron, 1948 (NEW SYNONYM)

Remarks: Shells of this form are moderately common in deep water in NSW, but they vary in size from 4-10 mm, in width from slender to broad, and in the presence or absence of the lip denticle.  It is not clear if only one or several species is present.  Marginella lodderae May, 1911 and Marginella maugeana Hedley, 1915, both described from  Tasmania, may be large forms of this species.

Fig. 1a: SYNTYPE of Marginella kemblensis Hedley, 1903; 63-75 fathoms (115-137 m) off Port Kembla, NSW (C.016345)

Fig. 1b: HOLOTYPE of Marginella cuneata Laseron, 1948; Twofold Bay, NSW, in 5-25 fathoms (9-46 m) (C.103366).


Copyright Des Beechey 2003