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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
E =
Endemic
I =
Introduced
Gastropoda - Vetigastropoda - Trochaclididae:
Trochaclididae
 
Genus: Acremodontamap >
Acremodonta crassicosta (Powell, 1937)
Height 2.05mm, Width 2.07mm, Endemic
Off Three Kings Islands, 102-256 metres (dead to 805 metres) [A]
Genus: Acremodontinamap >
Acremodontina atypica (Powell, 1937)
Height 1.7mm, Diameter 1.6mm, Endemic
Three Kings Islands, 206-211 metres, (dead 91-622 metres) [A]
Acremodontina carinata (Powell, 1940)
Height 2.17mm, Diameter 1.98mm, Endemic
Three Kings Islands and north-eastern North Island, 27-211 metres (dead to 805 metres) [A]
Height 1.77, Width 1.83mm, Endemic
Off Raoul Island, Kermadec Islands, 165-220 metres [K.]
Acremodontina magna Marshall, 1995
Height 3.35mm, Width 3.8mm, Endemic
Off Three Kings Islands, 805 metres [A]
Acremodontina poutama (E.C.Smith, 1962)
Height 2mm, Width 1.8mm, Endemic
Stewart and Snares Islands, SW South Island, 26-55 metres (dead to 183 metres) [F]
Acremodontina simplex (Powell, 1937)
Width 1.75mm, Height 1.4mm, Endemic
Three Kings Islands and NW North Island, 78-178 metres (dead to 805 metres) [A]
Acremodontina varicosa Marshall, 1995
Height 2.67mm, Diameter 2.57mm, Endemic
NW of Three Kings Islands, 192-805 metres. Also early Pliocene, Pitt Island, Chatham Islands [A]
Genus: Trochaclismap >
Trochaclis attenuata Marshall, 1995
Height 1.7mm, Diameter 1.25mm, Endemic
Three Kings Islands, 192-440 metres [A]
Trochaclis calva Marshall, 1995
Height 2.2mm, Endemic
Off Three Kings Islands, 805 metres [A]
Trochaclis cristata Marshall, 1995
Width 1.5mm, Height 1.5mm, Endemic
NW of Three Kings Islands, 710 metres [A]
Trochaclis elata Marshall, 1995
Width 1.3mm, Height 1.6mm, Endemic
Off Three Kings Islands, 310-805 metres [A]
Trochaclis regalis Marshall, 1995
Height 1.58mm, Diameter 1.63mm, Endemic
Off Three Kings Islands, 310-710 metres [A]