Gibberula subbulbosa (Tate, 1878)
Diagnosis: Shell small in size, colourless transparent to opaque white; spire medium height, not immersed; outer lip thickened internally, lirate along upper two-thirds on the internal thickening, sometimes with weaker lirae extending a little into aperture; external varix absent; distinct siphonal notch present; posterior notch present but weak; columella multiplicate with total of 5-7 plaits/lirae.
Size: Adults 2.5 – 4 mm in length
Distinguised from G.
agapeta by its smaller size and by its habitat.
This is a common beach species in NSW.
Synonymy: A synonym is Marginella beddomei Petterd, 1884 (Hewish in Wilson, 1994).
Fig. 1: Huskisson, Jervis Bay, NSW (C.313584). This is the specimen figured by Laseron (1948, fig. 14).
Copyright Des Beechey 2004