Vertigo ovata Say, 1822 (=pygmaea of authors) Height 2.7mm, Width 1.7mm, Land, North Island, Introduced. Native to North America, from Alaska and northern Canada southwards over most of the U.S.A. to Florida, the Gulf of Mexico, and California. The only known naturalised occurrence outside of North America is New Zealand North Island L.N.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