Warén, A., Bouchet, P. 1991 Mollusca Gastropoda: Systematic position and revision Haloceras Dall, 1889 (Caenogastropoda, Haloceratidae, fam. nov.), Mémoires du Muséum National d'Histoire Naturelle, 150 (p.153)
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 approxomation 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