A Field Guide to the Snails of Lord Howe Island

76 Family Charopidae (Pinwheel Snails) Genus Pseudocharopa Peile, 1929 Shell. Size: H = 5.5-8.3 mm, D = 8.3-17.7 mm. Colour: Flammulated with zigzags of orange-brown and cream. Shape: Ear-shaped with a flat to moderately low spire and sometimes a rapidly increasing last whorl; whorls flattened or with a supraperipheral sulcus above periphery, rounded below; sutures impressed. Sculpture: Protoconch with radial ribs and sometimes spiral threads; teleoconch with closely to very widely spaced, curved, prominent radial ribs. Aperture: Ovately lunate, breadth greater than height, flattened on upper edge. Umbilicus: Very narrow to moderately wide. Animal. Grey to black with a lime-green to grey sole. Habitat and occurrence. Upper slopes and summits of Mt Gower and Mt Lidgbird, in leaf litter or crawling on exposed rock surfaces. Remarks. Differs from all other genera in its relatively large ear- shaped shell, patterned with zigzagging flammulations, with either a supraperipheral sulcus or whorls flattened above the periphery. All species have shown a strong decline in numbers since they were first described, with one presumed extinct and two listed as Critically Endangered. Malabar Kim’s Lookout Transit Hill Intermediate Hill Mt Lidgbird Mt Gower ▲ ▲ ▲ ▲ ▲ ▲ ● P. exquisita ● P. ledgbirdi ● P. whiteleggei