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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 - Caenogastropoda - Neogastropoda - Borsoniidae
Borsoniidae
 
Genus: Apaturrismap >
Apaturris expeditionis (Oliver, 1915)
Endemic
Kermadec Islands [K.]
Genus: Awateriamap >
Awateria optabilis (Murdoch & Suter, 1906)
Height 44mm, Width 19mm, Endemic
Off North Island east coast, recorded from Great Barrier Island to Kaikoura [A]
Genus: Bathytoma (Bathytoma)map >
Bathytoma (Bathytoma) murdochi Finlay, 1930 (=finlay Powell)
Height 20mm, Width 9mm, Endemic
Northland east coast to Mahia, trawled around 65-450 metres [A]
Genus: Bathytoma (Riuguhdrilla)map >
Height 40mm, Width 17mm, Endemic
Off North Island and Chatham Rise. Trawled from around 400-1300 metres [ACFM]
Genus: Maoritomellamap >
Maoritomella albula (Hutton, 1873)
Height 9mm, Width 3.7mm, Endemic
North, South and Stewart Island [ACF]
Maoritomella ischna (Watson, 1881)
Height 8.5mm, Width 2.25mm, Endemic
East of East Cape, 1280 metres [A]
Maoritomella multiplex (Webster, 1906)
Height 5.5mm, Width 2.5mm, Endemic
Trawled off North Island [A]
Height 10.5mm, Width 4mm, Endemic
Off Hawkes Bay, North Island, 180 metres [C]
Genus: Phenatomamap >
Phenatoma rosea (Quoy & Gaimard, 1833)
Height 32mm, Width 11mm, Endemic
North, South and Chatham Islands [ACFM]
Phenatoma zelandica (E.A.Smith, 1877)
Height 25mm, Width 10mm, Endemic
North and South Islands, as far south as Otago Heads [ACF]
Genus: Zemaciesmap >
Zemacies excelsa Sysoev & Bouchet, 2001
Kermadec Islands [K.]