NZ Mollusca - Semicassis pyrum

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Taxonomy

Family: Subfamily:

CASSIDAE: PHALIINAE

Full Classification:

Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Tonnoidea (Superfamily)
> Cassidae (Family)
> Phaliinae (Subfamily)
> Semicassis (Genus)
> pyrum (Species)

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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

Species Links

WoRMS (Marine Species)

Images: Semicassis pyrum (Lamarck, 1822)

Uretiti Beach, Whangarei, Northland, NZ. 68mm

Deep water of Cape Kidnappers, NZ. 64mm

Washed up on Bream Bay, Northland, NZ. 56mm

Holotype of Xenogalea finlay, Iredale, collected 36 metes, between Taiaroa Head and Waikouaiti, Otago, NZ (MA70852). © Auckland Museum (CC-BY)

Holotype of Xenogalea powelli, Finlay, collected 73-90 metes, off Whakatane, Bay of Plenty, NZ (MA70853). © Auckland Museum (CC-BY)

Holotype of Xenogalea matai, Powell, collected Beach Harbour, Breaksea Sound, Fiordland, NZ (MA71187). © Auckland Museum (CC-BY)

Holotype of Xenophalium harrisonae Powell, collected 1926, Mason Bay, Stewart Island, NZ (MA72169). © Auckland Museum (CC-BY)

Taxonomy

Family: Subfamily:

CASSIDAE: PHALIINAE

Full Classification:

show/hide full taxonomy

Genus Synonyms:

Synonymised Names:

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Details: Semicassis pyrum (Lamarck, 1822)

Size/Grows to:

Height 118mm, Width 77mm

Distribution:

North, South, Stewart and Chatham Islands

Geographical Range:

ACFM

Notes:

Helmet Shell, Marine

Species Links

WoRMS (Marine Species)

Distribution Map

References and Publications

Smith, N. Oct/1995 Helmet Shells from Waihi Beach, Poirieria, 17(4)
Beu, A.G., Maxwell, P.A. 1990 Cenozoic Mollusca of New Zealand, New Zealand Geological Survey, 58 (p.353)
Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.159)
Beu, A.G. 1976 Arrival of Semicassis pyrum (Lamarch) and other Tonnacean Gastropods in the Southern Ocean during Pleistocene Time, Journal of the Royal Society of New Zealand, 6(4) (p.417)

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.

Kermadec Islands

Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape

Cookian - Lower North Island and the northern part of the South Island

Forsterian - Otago, Fiordland and Stewart Island

Moriorian - Chatham Islands, Pitt Island

An=

Antipodean - Subantarctic Islands of New Zealand

Fw =

Freshwater

L =

Land

N =

North Island

S =

South Island

R =

Recent

Sf =

Subfossil

Fo =

Fossil