[2][1][3] This species was originally described as Charopa bicolor by Frank Climo in 1973.

The holotype specimen was collected by Frank Climo at Great Island, below Castaway Camp during the 1970 Three Kings Islands expedition.

[4] In one survey, it was recorded at 91% of sites on the island and has been suggested to be the most widespread snail species on the island.

It has been hypothesized to be a colonizer of areas not yet inhabited by other land snails.

[4] Under the New Zealand Threat Classification System, this species is listed as Naturally Uncommon with the qualifiers of "Conservation Dependent", "Island Endemic", "Range Restricted" and "Biologically Sparse".