A Field Guide to the Snails of Lord Howe Island

82 Pulcharopa plesa (cont’d) Habitat and occurrence. In the lowland areas, most prevalent on the northern part of the island (key localities Steven’s Reserve, the Clear Place, Valley of the Shadows, Johnson’s Beach) but also found at Boat Harbour, Little Slope and Big Slope. Never collected alive but likely to be a litter-dweller. Rare. Remarks. Another small, rare (but probably under-collected), poorly known charopid. Family Charopidae (Pinwheel Snails) Introduced Charopidae Genus Diphyoropa Hyman & Stanisic, 2005 Shell. Size: H = 1.6-1.8 mm, D = 2.8-3.5 mm. Colour: Uniform pale fawn to coppery brown. Shape: Discoidal to nautiliform with a flat to slightly sunken spire; whorls rounded; sutures impressed. Sculpture: Protoconch with spiral lirae fading and changing to widely spaced radial ribs towards teleoconch; teleoconch with crowded to moderately widely spaced radial ribs. Aperture: Ovately lunate. Umbilicus: Widely open. Habitat and occurrence. SoutheasternNSW to southeasternQld. Diphyoropa saturni has been introduced into Victoria and Lord Howe Island. Remarks. Two additional species, Diphyoropa macleayana ad D. jonesei , are present on the eastern coast of Australia. On Lord Howe Island, Diphyoropa differs from other small charopids in its uniform-coloured shell with a flat to slightly sunken spire. Diphyoropa saturni 2 mm