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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 - Caenogastropoda - Hypsogastropoda - Family: Cassidae

Cassidae: Cassinae

 

Genus: Galeodea

 
Galeodea plauta Beu, 2008
Height 55mm
Off Ahipara, Northland 290-500 metres. Also Castlecliff (Upper Westmere Siltstone), Wanganui [ACE.]
 
Height 49mm, Width 33mm
Off North, South, Stewart and Chatham Islands [ACFME.]

Cassidae: Oocorythinae

 

Genus: Oocorys

 
Oocorys sulcata Fischer, 1884 (=watsoni Locard, =fischeri Locard, =umbilicata Quinn, =abyssorum Verrill & Smith, =rotunda Dall, =elongata Schepman, =weberi Schepman, =schepmani Turner)
Height 55mm, Width 35mm
World-wide, northern New Zealand [A]
Oocorys verrillii (Dall, 1889)
Height 36mm
Norfolk Ridge, NW of Cape Reinga [A]
 

Cassidae: Phaliinae

 

Genus: Casmaria

 
Casmaria perryi (Iredale, 1912)
Height 53mm, Width 27mm
SE Australia, Kermadec Islands and Northland east coast [K.A]

Genus: Semicassis

 
Semicassis labiata (Perry, 1811) (=insperatum Iredale)
Height 83mm, Width 52mm
Northern part of North Island to Mahia. Victoria to Queensland and Norfolk Island [AC]
Semicassis pyrum (Lamarck, 1822) (=ericanum Powell, =hamiltoni Powell, =matai Powell, =stadiale Hedley)
Height 85mm, Width 55mm, Helmet Shell
North, South, Stewart and Chatham Islands [ACFM]
Semicassis royana (Iredale, 1914)
Height 150mm, Width 80mm
Off Three Kings to Northland east coast, in craypots around 40 metres. Also off Kermadec Islands [K.A]
Semicassis sophia (Brazier, 1872)
Height 70mm, Width 50mm
Northern. Off Northland east coast. Also Queensland to New South Wales and Kermadec Islands [K.A]
Semicassis thomsoni (Brazier, 1857)
Height 80mm, Width 55mm, Distinguished by the deeply indented margin of the columellar shield
Off east coast Northland to Bay of Plenty, New Zealand. Also Australia [A]