Dignamoconcha

Dignamoconcha is a monotypic genus of pinhead or dot snails that is endemic to Australia's Lord Howe Island in the Tasman Sea.

Species

Dignamoconcha dulcissima Iredale, 1944 – the '''pagoda pinhead snail'''

Description

The trochoidal shell of the mature snail is 3.3 mm in height, with a diameter of 5.7 mm, with a stepped, pagoda-like spire. It is pale golden-brown in colour, with white radial streaks. The whorl profile is flattened above and below a strongly keeled periphery. It has a diamond-shaped aperture and widely open umbilicus. It is the largest known punctid in Australia.

Distribution and habitat

Although the snail is sometimes reported from other sites on the island, its main area of occurrence is on the slopes of the southern mountains, at altitudes of 200–600 m in rainforest, where it is arboreal and found on the undersides of green leaves, especially those of palms.