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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)
> royana (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:
=Cassidea royana Iredale, 1914
=Semicassis (Semicassis) royana (Iredale, 1914) accepted, alternate representation
=Xenophalium ericanum Powell, 1928
=Xenophalium hedleyi Iredale, 1927
Images: Semicassis royana (Iredale, 1914)
From crayfish pot, off Cape Maria van Diemen, Far North, NZ. 128mm
From cray pots off the Far North, NZ. 125mm
Holotype of Xenophalium ericanum Powell, off Berghens Point, Doubtless Bay, Northland, NZ (MA72168). © Auckland Museum (CC-BY)
Taxonomy
Family: Subfamily:
CASSIDAE: PHALIINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Tonnoidea (Superfamily)
> Cassidae (Family)
> Phaliinae (Subfamily)
> Semicassis (Genus)
> royana (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:
=Cassidea royana Iredale, 1914
=Semicassis (Semicassis) royana (Iredale, 1914) accepted, alternate representation
=Xenophalium ericanum Powell, 1928
=Xenophalium hedleyi Iredale, 1927
Details: Semicassis royana (Iredale, 1914)
Size/Grows to:
Height 165mm, Width 88mm
Distribution:
Off Three Kings to Northland east coast, in craypots around 40 metres. Also off Kermadec Islands
Geographical Range:
KA
Notes:
Marine
Distribution Map
 
References and Publications
  • Brook, F.J., Marshall, B.A. 1998 The coastal molluscan fauna of the northern Kermadec Islands, southwest Pacific Ocean, Journal of the Royal Society of New Zealand, 28 (p.220)
  • Hart, M.R. 1995 Xenophalium royanum Iredale, 1914, New Zealand's prince of helmets, World Shells, 15 (p.104)
  • 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.148)
  • Powell, A.W.B. 1967 New Zealand Molluscan Systematics with Descriptions of New Species: Part 6, Records of the Auckland Institute and Museum, 6(3) (p.187)
  • Iredale, T. 1914 Description of a new species of Cassidea, Proceedings of the Malacological Society of London, 11(1) (p.180) Original Description

*98 © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)

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
R =
Recent
Sf =
Subfossil
Fo =
Fossil
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