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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.
Kermadec Islands
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
Forsterian - Otago, Fiordland and Stewart Island
Moriorian - Chatham Islands, Pitt Island
Antipodean - Subantarctic Islands of New Zealand
FW =
L =
N =
North Island
S =
South Island
E =
I =
Gastropoda - Vetigastropoda - (Vetigastropoda) - Family: Trochaclididae



Genus: Acremodonta

Acremodonta crassicosta (Powell, 1937)
Height 2.05mm, Width 2.07mm
Off Three Kings Islands, 102-256 metres (dead to 805 metres) [AE.]

Genus: Acremodontina

Acremodontina atypica (Powell, 1937)
Height 1.7mm, Diameter 1.6mm
Three Kings Islands, 206-211 metres, (dead 91-622 metres) [AE.]
Acremodontina carinata (Powell, 1940)
Height 2.17mm, Diameter 1.98mm
Three Kings Islands and north-eastern North Island, 27-211 metres (dead to 805 metres) [AE.]
Height 1.77, Width 1.83mm
Off Raoul Island, Kermadec Islands, 165-220 metres [K.E.]
Acremodontina magna Marshall, 1995
Height 3.35mm, Width 3.8mm
Off Three Kings Islands, 805 metres [AE.]
Acremodontina poutama (E.C.Smith, 1962)
Height 2mm, Width 1.8mm
Stewart and Snares Islands, SW South Island, 26-55 metres (dead to 183 metres) [FE.]
Acremodontina simplex (Powell, 1937)
Width 1.75mm, Height 1.4mm
Three Kings Islands and NW North Island, 78-178 metres (dead to 805 metres) [AE.]
Acremodontina varicosa Marshall, 1995
Height 2.67mm, Diameter 2.57mm
NW of Three Kings Islands, 192-805 metres. Also early Pliocene, Pitt Island, Chatham Islands [AE.]

Genus: Trochaclis

Trochaclis attenuata Marshall, 1995
Height 1.7mm, Diameter 1.25mm
Three Kings Islands, 192-440 metres [AE.]
Trochaclis calva Marshall, 1995
Height 2.2mm
Off Three Kings Islands, 805 metres [AE.]
Trochaclis cristata Marshall, 1995
Width 1.5mm, Height 1.5mm
NW of Three Kings Islands, 710 metres [AE.]
Trochaclis elata Marshall, 1995
Width 1.3mm, Height 1.6mm
Off Three Kings Islands, 310-805 metres [AE.]
Trochaclis regalis Marshall, 1995
Height 1.58mm, Diameter 1.63mm
Off Three Kings Islands, 310-710 metres [AE.]