A Field Guide to the Snails of Lord Howe Island

124 Family Punctidae (Pinhead or Dot Snails) Genus Dignamoconcha Iredale, 1944 Description. As for species (below). Remarks. This monotypic genus was originally thought to be a member of family Helicarionidae, but was shown by Hyman (2005) to belong to family Punctidae. Dignamoconcha dulcissima Iredale, 1944 Pagoda Pinhead Snail Shell. Size: H = 3.3 mm, D = 5.7 mm. Colour: Pale golden brown with white radial streaks. Shape: Trochoidal with a stepped, pagoda-like spire; whorl profile flattened above and below a strongly keeled periphery; last two whorls descending rapidly, giving spire a stepped appearance. Sculpture: Protoconch sculptured with spiral grooves, teleoconch sculptured with spiral and radial lirae. Aperture: Diamond- shaped. Umbilicus: Widely open, bordered by strong angulation. Animal. Greenish-yellow, with grey neck and eyestalks. Malabar Kim’s Lookout Transit Hill Intermediate Hill Mt Lidgbird Mt Gower ▲ ▲ ▲ ▲ ▲ ▲ ● D. dulcissima