Vallonia costata (Müller, 1774) Land, North Island, Introduced North Island. Auckland L.N.I.
Vallonia excentrica Sterki, 1893 (=pulchella of authors) Height 1.2mm, Width 2.3mm, Land, North Island, South Island, Introduced. Native to the Mediterranean, western Europe, Atlantic islands, and North America. Introduced to St. Helena, South Africa, Australia, and New Zealand North and South Island L.N.S.I.
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