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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
Gastropoda - Pulmonata - Basommatophora - Family: Siphonariidae

Siphonariidae

 

Genus: Siphonaria

 
Siphonaria australis Quoy & Gaimard, 1833 (=zelandica of authors, =cookiana Suter)
Length 27mm, Width 21mm
Throughout NZ, including Stewart, Chatham and Snares Islands [ACFME.]
Siphonaria propria Jenkins, 1983 (=cookiana of authors)
Length 13mm, Width 10mm
North, South, Stewart and Chatham Islands [ACFME.]
Siphonaria raoulensis Oliver, 1915
Kermadec Islands [K.E.]
 

Genus: Siphonaria (Benhamina)

 
Siphonaria (Benhamina) obliquata (G.B.Sowerby I, 1825)
Length 65mm, Width 44mm
Cook Strait southwards. Stewart and Auckland Islands [CFAnE.]

Genus: Siphonaria (Kerguelenella)

 
Length 27mm, Width 19mm, Height 9mm, Apex varying from between the posterior fourth and the posterior margin, or even beyond
Subantarctic Islands. Auckland, Campbell and Antipodes Islands [FAnE.]
Length 16mm, Width 10mm, Height 5mm, Apex within margin of lip
Macquarie Islands. Also Straits of Magellan, Patagonia, Falklands, South Georgia [AnE.]
 
Length 17mm, Width 12mm, Height 7mm, Apex projecting beyond margin of lip
Stewart Island, Snares, Bounty Islands. On shaded rock faces near high tide level [FAnE.]

Genus: Williamia

 
Williamia radiata nutata (Hedley, 1908) (=kermadecensis Iredale)
Height 7mm, Width 5mm
Northland NZ and Kermadec Islands [K.A]