Species List for Genus: Semicassis
Mollusca (Phylum) > Gastropoda (Class) > Caenogastropoda (Subclass) > Littorinimorpha (Order) > Tonnoidea (Superfamily) > Cassidae (Family) > Phaliinae (Subfamily) > Semicassis (Genus)
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Genus: Semicassis
Semicassis labiata (Perry, 1811)
(=insperatum Iredale, =collactea Finlay)
Height 83mm, Width 52mm, Marine
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, Marine
North, South, Stewart and Chatham Islands ACFM
Semicassis royana (Iredale, 1914)
Height 150mm, Width 80mm, Marine
Off Three Kings to Northland east coast, in craypots around 40 metres. Also off Kermadec Islands KA
Semicassis sophia (Brazier, 1872)
Height 70mm, Width 50mm, Marine
Northern. Off Northland east coast. Also Queensland to New South Wales and Kermadec Islands KA
Semicassis thomsoni (Brazier, 1857)
Height 80mm, Width 55mm, Marine, Distinguished by the deeply indented margin of the columellar shield
Off east coast Northland to Bay of Plenty, New Zealand. Also Australia A
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 approximation 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
R =
Recent
Sf =
Subfossil
Fo =
Fossil