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Mollusca (Phylum) > Gastropoda (Class) > Heterobranchia (Subclass) > Lymnaeoidea (Superfamily) > Planorbidae (Family)
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Planorbidae

  • Gyraulus corinna Gray, 1850
    Length 3.3mm, Width 2.6mm, Height 0.8mm, Freshwater, North Island, South Island, Endemic. Four slowly increasing whorls
    North and South Island N.S.E.
  • Gyraulus kahuica Finlay & Laws, 1931
    Length 6mm, Width 5mm, Height 1.75mm, Freshwater, North Island, South Island, Endemic. Much larger than G.corinna, 3.9-6.0 mm in diameter, yet with only 3-3.5 whorls, which are more accellerated
    North and South Island N.S.E.
  • Segmentina complanata (Linnaeus, 1758)
    Height 1mm, Width 4mm, Freshwater, North Island, Introduced
    North Island, New Plymouth N.I.
Key to Geographical Ranges
NZ Map showing 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.
K=
Kermadec Islands
A=
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
C=
Cookian - Lower North Island and the northern part of the South Island
F=
Forsterian - Otago, Fiordland and Stewart Island
M=
Moriorian - Chatham Islands, Pitt Island
An=
Antipodean - Subantarctic Islands of New Zealand
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
E =
Endemic
I =
Introduced
R =
Recent
Sf =
Subfossil
Fo =
Fossil