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Semicassis pyrum (Lamarck, 1822)Species Images
Uretiti Beach, Whangarei, Northland, NZ. 68mm
Deep water of Cape Kidnappers, NZ. 64mm
Washed up on Bream Bay, Northland, NZ. 56mm
Taxonomy: Semicassis pyrum (Lamarck, 1822)
Classification:
Mollusca (Phylum) > Gastropoda (Class) > Caenogastropoda (Subclass) > Littorinimorpha (Order) > Tonnoidea (Superfamily) > Cassidae (Family) > Phaliinae (Subfamily) > Semicassis (Genus) > pyrum (Species)
Family: Subfamily:
CASSIDAE: PHALIINAE
Genus Synonyms:
=Cassis (Semicassis) Mörch, 1852
=Phalium (Semicassis) Mörch, 1852
=Phalium (Xenogalea) Iredale, 1927
=Semicassis (Xenophalium) Iredale, 1927
=Xenogalea Iredale, 1927
=Xenophalium Iredale, 1927
Synonymised Names:
=Cassidea multisecta Finlay, 1924
=Cassidea stadialis Hedley, 1914
=Cassis nivea Brazier, 1872
=Cassis pyrum Lamarck, 1822
=Cassis striatus Hutton, 1873
=Cassis tumida Petterd, 1886
=Phalium pyrum (Lamarck, 1822)
=Phalium stadiale (Hedley, 1914)
=Semicassis (Semicassis) pyrum (Lamarck, 1822)
=Xenogalea denda Cotton, 1945
=Xenogalea finlayi Iredale, 1927
=Xenogalea halli Cotton, 1954
=Xenogalea mawsoni Cotton, 1945
=Xenogalea powelli Finlay, 1928
=Xenogalea pyrum (Lamarck, 1822)
=Xenogalea spectabilis Iredale, 1929
=Xenogalea stadialis (Hedley, 1914)
=Xenogalea wilsoni Cotton, 1954
=Xenophalium (Xenogalea) abernethyi Dell, 1956
=Xenophalium (Xenogalea) matai Powell, 1952
=Xenophalium abernethyi Dell, 1956
=Xenophalium finlayi (Iredale, 1927)
=Xenophalium hamiltoni Powell, 1928
=Xenophalium harrisonae Powell, 1928
=Xenophalium matai Powell, 1952
=Xenophalium pyrum (Lamarck, 1822)
=Xenophalium pyrum pyrum (Lamarck, 1822)
=Xenophalium wanganuiense Powell, 1928
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Details: Semicassis pyrum (Lamarck, 1822)
Size/Grows to:
Height 85mm, Width 55mm
Distribution:
North, South, Stewart and Chatham Islands
Geographical Range:
ACFM
Notes:
Helmet Shell, Marine
Distribution Map
 
References and Publications

Key to Geographical Ranges
NZ Map showing 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