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.

The whorls are rounded, with impressed sutures and distinct radial ribs.

It has an ovately lunate aperture and narrowly open umbilicus.

[2] This rare snail has a distribution limited to the summits and upper slopes of the island's southern mountains.

The only live specimens were collected from shrubs and tree trunks.