Meads, M.J., Walker, K.J., Elliott, G.P. 1984 Status, conservation, and management of the land snails of the genus Powelliphanta (Mollusca: Pulmonata), New Zealand Journal of Zoology, 11(3) (p.289)
Powell, A.W.B. 1979New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.337)
Climo, F.M. 1978 The Powelliphanta gilliesi - traversi - hochstetteri - rossiana - lignaria - superba ring species (Mollusca: Pulmonata), New Zealand Journal of Zoology, 5(2) (p.289)
Powell, A.W.B. 1930 The Paryphantidae of New Zealand: their hypothetical ancestry, with descriptions of new species and a new genus, Records of the Auckland Institute and Museum, 1 (p.41) Original Description
Key to Geographical Ranges
The symbols K.A.C.F.M.An. are used to indicate the geographical range of the species.
They have been adopted to give an approximation of the range of each species within New Zealand.
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
Cookian - Lower North Island and the northern part of the South Island