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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.
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
Mollusca (Phylum) > Gastropoda (Class) > Caenogastropoda (Subclass) > Littorinimorpha (Order) > Rissooidea (Superfamily) > Rissoinidae (Family) > Rissoina (Genus)
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Genus: Rissoinamap >
Rissoina achatina Odhner, 1924
Height 6.2mm, Width 2.2mm, Marine, Endemic
Northland to Bay of Plenty and off East Cape AE.
Rissoina achatinoides Powell, 1937
Height 4.8mm, Width 1.8mm, Marine, Endemic
Off North Cape AE.
Rissoina anguina Finlay, 1927
Height 5.5mm, Width 2.5mm, Marine, Endemic
Northland to Mahia Peninsula ACE.
Rissoina aupouria Powell, 1937
Height 8.5mm, Width 3.5mm, Marine, Endemic
Off Three Kings Islands AE.
Rissoina chathamensis (Hutton, 1873)
Height 7.5mm, Marine, Endemic
Throughout NZ, Stewart and Chatham Islands ACFME.
Rissoina costata A. Adams, 1853
Marine
Kermadec Islands K
Rissoina fictor Finlay, 1930
Height 5.6mm, Width 1.9mm, Marine, Endemic
Off Northland to Bay of Plenty AE.
Rissoina fucosa Finlay, 1930
Height 4.8mm, Width 2.0mm, Marine, Endemic
Off Northland to East Cape AE.
Rissoina larochei Finlay, 1930
Height 2.9mm, Width 1.3mm, Marine, Endemic
Northland AE.
Rissoina manawatawhia Powell, 1937
Height 3.7mm, Width 1.4mm, Marine, Endemic
Off Three Kings Islands AE.
Rissoina powelli Finlay, 1930
Height 7.9mm, Width 3.0mm, Marine, Endemic
Off Poor Knights Islands AE.
Rissoina zonata Suter, 1909
Height 11.5mm, Width 4.5mm, Marine, Endemic. Usually white, but occasionally with a broad basal brown zone
Northland to Cape Runaway AE.