MolluscIreland - land and freshwater
  • Candidula gigaxii (L. Pfeiffer 1848)

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Similar in appearance to C. intersecta but more depressed with 5-5 convex whorls, scarcely angled at the periphery and with shallow sutures. Surface white or brownish-opaque with fine, irregular ribbing and marked with thin, interrupted, spiral bands. Mouth broader than that of C. intersecta joining the previous whorl at a less oblique angle. Very rare, possibly extinct, on eskers in the central plain.

Key characteristics

  • A slightly globular, strongly depressed shell of 5-5 whorls
  • Unlike C. intersecta scarcely angled at the periphery and with shallow sutures
  • Surface whitish or brownish-opaque with fine spiral bands which are often interrupted
  • Mouth with an internal rib and broader than that of C. intersecta with the aperture joining the previous whorl at a less oblique, more right, angle
  • Umbilicus broad but eccentric (not evenly rounded) due to the sudden expansion of the last whorl

Size

7-12 mm.

World Distribution

Possibly introduced to the British Isles during the Roman period (Kerney, 1999). A west European species found in France and the low countries plus the British Isles. Distribution type: Oceanic Temperate (71).

Irish Distribution

Stelfox (1958) reported four Irish sites in Cos. Kildare and Roscommon discovered in the nineteen -thirties but the species has not been seen since.

Ecology

  • In Ireland confined to dry, warm soils, for instance on glacial eskers in midland counties
  • Prefers, short, well-grazed grassland

Red List status

  • Data deficient.

Wikipedia link

Wikipedia page for Candidula gigaxii

 Anderson, R., (2016). Candidula gigaxii (L. Pfeiffer 1848). [In] MolluscIreland.
http://www.habitas.org.uk/molluscireland/species.asp?ID=47 Accessed on 2017-10-20.