Genus Omegapilla Iredale, 1937

Museums

Regional Maps

• Omegapilla Iredale, T. 1937. A basic list of the land Mollusca of Australia. The Australian Zoologist 8: 287-333 [12 Mar. 1937] [304] [re-elevated to generic rank by Stanisic et al. 2010].

  Type species:

   Pupa nelsoni Cox, 1864 by original designation.

Introduction

Omegapilla is a chiefly southern Australian genus and is represented by the single wide ranging Omegapilla australis. The Red Centre Pupilla (Gibbulinopsis) ficulnea (Tate, 1894) is dextrally coiled but otherwise very similar to Omegapilla australis. The combination of larger size, single parietal tooth and cylindrically pupiform shape distinguish Omegapilla from the somewhat similar Gastrocopta.

Distribution

States

New South Wales, Queensland, South Australia, Tasmania, Victoria, Western Australia

IBRA and IMCRA regions

IBRA

NSW, Qld, SA, Tas, Vic, WA: Brigalow Belt South (BBS), Ben Lomond (BEL), Esperance Plains (ESP), Eyre Yorke Block (EYB), Hampton (HAM), Jarrah Forest (JF), Murray Darling Depression (MDD), NSW North Coast (NNC), Nullarbor (NUL), Sydney Basin (SB), South East Corner (SEC), Swan Coastal Plain (SWA), Tasmanian South East (TSE)

Diagnosis

Shell tiny, pupiform, sinistral or dextral, smooth; whorls slightly rounded, sutures weakly impressed; aperture ovately lunate with a single large parietal tooth, one or two smaller nodules inside aperture and a columellar fold. Colour bronze to orange-brown.

Diagnosis References

Stanisic, J., Shea, M., Potter, D. & Griffiths, O. 2010. Australian Land Snails. A field guide to eastern Australian species. Mauritius : Bioculture Press Vol. 1 595 pp. [98]

General References

Smith, B.J. 1992. Non-Marine Mollusca. In, Houston, W.W.K. (ed.). Zoological Catalogue of Australia. Non-marine Mollusca. Canberra : Australian Government Publishing Service Vol. 8 xii 408 pp. [293] (Omegapilla treated as a synonym of Pupilla (Gibbulinopsis))

Solem, A. 1986. Pupilloid land snails from the south and mid-west coasts of Australia. Journal of the Malacological Society of Australia 7: 95-124 [105]

Solem, A. 1991. Distribution and diversity patterns of Australian pupilloid land snails (Mollusca: Pulmonata: Pupillidae, s.l.). Veliger 34(3): 233-252 [252] (considered Omegapilla a subgenus of Gibbulinopsis)

Stanisic, J., Shea, M., Potter, D. & Griffiths, O. 2010. Australian Land Snails. A field guide to eastern Australian species. Mauritius : Bioculture Press Vol. 1 595 pp. [96, 98, 567] (generic ranking)

History of changes