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Gergovia haswelli Garrard, 1975

Description: Protoconch consisting of 1 smooth white whorls. Teleoconch of 3 roundly shouldered whorls, with spiral ribs and axial folds. Spiral ribs evenly sized and spaced, 5-7 on penultimate whorl, about 12 on body whorl; sometimes weakly thickened at intersection with axial folds. Axial folds about nine on body whorl. Aperture with short, broad, open siphonal canal; outer lip smooth or lirate internally. Umbilicus a narrow fissure behind columellar callus. Columella with two weak plaits. Colour white or fawn.

Size: Up to 6 mm in length.

Distribution: Endemic to Australia: Sydney, NSW, to Bass Strait.

Habitat: Subtidal, 146-366 metres. Rare

Comparison: See Gergovia patricia.

Remarks: Garrard described this species from only three lots, but now more material has become available. North Queensland shells have much heavier axial sculpture, and may be this species or another undescribed species. Shells from NSW and Victoria show sculpture intermediate between this species and G. patricia and are difficult to place.

Figs. 1,2   HOLOTYPE   22 miles east of Narrabeen, NSW, in 146 m (C.025843)


Copyright Des Beechey 2005