MolluscIreland - land and freshwater
  • Peringia ulvae (Pennant 1777) Laver spire shell
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Peringia ulvae
© Dr Roy Anderson
Peringia ulvae
© Dr Roy Anderson
Peringia ulvae
© Dr Roy Anderson

Map hosted by the National Biodiversity Data Centre, Waterford
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A very solid little operculate shell, conical like an inverted ice-cream cone, with very flattened whorls and yellowish-brown colour. Lives in huge densities on estuarine sands and muds. The animal has pale tentacles with a black bar before the tip.

Key characteristics

  • Small, very solid shell with flattened whorls and very shallow sutures
  • Slightly glossy, yellow-brown in colour
  • Animal dark with pale tentacles which bear a black bar just before the tip
  • Lives in fully saline conditions

Size

4-6 (-8) mm.

World Distribution

Distributed from northern Norway south through Europe to the Atlantic islands but not in the Mediterranean as variously reported in the past (Giusti et al., 1995). Distribution type: Oceanic Wide Temperate (61).

Irish Distribution

Widely distributed and abundant in coastal sands and muds in areas of slightly lowered salinity. Suitable habitat is often lacking on exposed coasts, as in many parts of western Ireland and on the north-east coast between the Bann Estuary in Londonderry and Larne Lough in Antrim.

Ecology

  • Mainly found in fully saline to near-fully saline coastal lagoons and estuaries and an important item of diet for over-wintering waders
  • Abundant in fine muds through to silty sand from EHWST to LWNT, burrowing just beneath the surface at low tide
  • Will tolerate hyper-saline conditions in some places
  • Fairly tolerant of organic pollution

Red List status

  • Least concern (lc).