[3] It was endemic to the Lake Pedder area in Tasmania, Australia, prior to its flooding in 1972 for a hydro-electric power scheme.

It is only known from the holotype specimen collected from a Lake Pedder beach in 1971.

A 1996 survey failed to find it and it is presumed extinct.

[1] The Lake Pedder earthworm mainly fed on microbes or algae on sand particles.

Their feeding habits were seen to have a considerable impact on the banks of the lake, as the particles they consumed were deposited on the surface of the ground in the form of castings.