| Hedleyoconcha addita | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Charopidae |
| Genus: | Hedleyoconcha |
| Species: | H. addita |
| Binomial name | |
| Hedleyoconcha addita | |
 | |
| Location of Lord Howe Island | |
Hedleyoconcha addita, also known as the Lord Howe Island conical pinwheel snail, is a species of pinwheel snail that is endemic to Australia's Lord Howe Island in the Tasman Sea. [2]
The trochoidal shell of adult snails is 5.6 mm in height, with a diameter of 7 mm, with a high conical spire, flat sutures and whorls rounded with a keeled edge. It is smooth and pale golden-brown. The umbilicus is narrowly open, partly concealed by the reflected lip of the roundly lunate aperture. [3]
The snail occurs only at the southern end of the island, on the summit of Mount Gower and nearby ledges. [3]
Limborelia innesi, also known as the compact palmleaf snail, is a species of palmleaf snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Opinorelia is a monotypic genus of palmleaf snails that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Charopella is a genus of two species of tiny pinwheel snails that are endemic to Australia's Lord Howe Island in the Tasman Sea.
Goweroconcha is a genus of three species of pinwheel snails that are endemic to Australia's Lord Howe Island in the Tasman Sea.
Gyropena is a genus of two species of tiny pinwheel snails that are endemic to Australia's Lord Howe Island in the Tasman Sea.
Mystivagor is a monotypic genus in the subfamily of the pinwheel snails
Pseudocharopa is a genus of three species of pinwheel snails that are endemic to Australia's Lord Howe Island in the Tasman Sea.
Pseudocharopa ledgbirdi, also known as the Mount Lidgbird pinwheel snail or the Mount Lidgbird charopid snail, is a species of pinwheel snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Pseudocharopa whiteleggei, also known as Whitelegge's pinwheel snail or Whitelegge's land snail, is a species of pinwheel snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Pulcharopa is a monotypic genus of pinwheel snails that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Allenella belli, also known as the beautiful pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Allenella formalis, also known as the brown turban pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Allenella planorum, also known as the angular pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Paralaoma goweri, also known as the mountain pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Paralaoma innesi, also known as Innes' pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Pernastela howensis, also known as the Lord Howe pinhead snail, is a tiny species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Charopella zela, also known as the Mount Gower banded pinwheel snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the pinwheel snail family, that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Goweroconcha wenda, also known as the pale-zigzag pinwheel snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the pinwheel snail family, that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Goweroconcha wilsoni, also known as Gower Wilson's pinwheel snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the pinwheel snail family, that is endemic to Australia's Lord Howe Island in the Tasman Sea.
Gyropena verans, also known as the sunken-spired pinwheel snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the pinwheel snail family, that is endemic to Australia's Lord Howe Island in the Tasman Sea.