Quick Search
To Advanced Search
Taxonomy
Family: Subfamily:
CASSIDAE: PHALIINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Tonnoidea (Superfamily)
> Cassidae (Family)
> Phaliinae (Subfamily)
> Semicassis (Genus)
> thomsoni (Species)
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:
=Cassis (Casmaria) thomsoni Brazier, 1876
=Cassis thomsoni Brazier, 1876
=Semicassis (Semicassis) thomsoni (Brazier, 1876) accepted, alternate representation
=Xenogalea thomsoni (Brazier, 1876)
=Xenogalea thomsoni palinodia Iredale, 1931
Images: Semicassis thomsoni (Brazier, 1876)
From the east coast, Far North, NZ. 61mm
Dredged off Northland, NZ. 62mm
Taxonomy
Family: Subfamily:
CASSIDAE: PHALIINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Tonnoidea (Superfamily)
> Cassidae (Family)
> Phaliinae (Subfamily)
> Semicassis (Genus)
> thomsoni (Species)
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:
=Cassis (Casmaria) thomsoni Brazier, 1876
=Cassis thomsoni Brazier, 1876
=Semicassis (Semicassis) thomsoni (Brazier, 1876) accepted, alternate representation
=Xenogalea thomsoni (Brazier, 1876)
=Xenogalea thomsoni palinodia Iredale, 1931
Details: Semicassis thomsoni (Brazier, 1876)
Size/Grows to:
Height 80mm, Width 55mm
Distribution:
Raoul Island and north-eastern North Island as far south as Bay of Plenty. Also Australia
Notes:
Marine, Native - Non-endemic, Distinguished by the deeply indented margin of the columellar shield
Distribution Map
 
References and Publications
  • Raven, J.L. Nov/2011 Notes on New Zealand collected species, Cookia, 23 (p.17)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.160)
  • Powell, A.W.B. 1976 On the considerable influx of warm water molluscs that have invaded northern New Zealand waters within recent years, Records of the Auckland Institute and Museum, 13 (p.160)
  • Powell, A.W.B. 1964 New Zealand Molluscan Systematics with Descriptions of New Species: Part 4, Records of the Auckland Institute and Museum, 6(1) (p.13)

NZ Geographical Regions
Key to symbols used in Checklist.
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
R =
Recent
Sf =
Subfossil
Fo =
Fossil
Recently Viewed