Powell, A.W.B. 1979New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.114)
Odhner, N.H. 1924 Papers from Dr. Th. Mortensen's Pacific Expedition 1914–1916. XIX. New Zealand Mollusca, Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening i Kjobenhavn, 77 (p.22) Original Description