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Taxonomy
Family: Subfamily:
LITTORINIDAE: LACUNINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Littorinoidea (Superfamily)
> Littorinidae (Family)
> Lacuninae (Subfamily)
> Risellopsis (Genus)
> varia (Species)
Synonymised Names:
=Adeorbis varius Hutton, 1873
=Risellopsis varia var. carinata Kesteven, 1902
Images: Risellopsis varia (Hutton, 1873)
Found in beach drift, Far North, NZ. 4.5mm
Found in beach drift, Far North, NZ. 4.5mm
Found in beach drift, Far North, NZ. 4.5mm
Taxonomy
Family: Subfamily:
LITTORINIDAE: LACUNINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Littorinoidea (Superfamily)
> Littorinidae (Family)
> Lacuninae (Subfamily)
> Risellopsis (Genus)
> varia (Species)
Synonymised Names:
=Adeorbis varius Hutton, 1873
=Risellopsis varia var. carinata Kesteven, 1902
Details: Risellopsis varia (Hutton, 1873)
Size/Grows to:
Width 8mm, Height 6mm
Distribution:
Throughout North, South, Stewart and Chatham Islands
Geographical Range:
ACFM
Notes:
Marine, Native - Endemic, Very common on upper tidal rocks
Distribution Map
 
References and Publications
  • Reid, D.G. 1989 The comparative morphology, phylogeny and evolution of the gastropod family Littorinidae, Philosophical Transactions of the Royal Society, 324 (p.91)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.88)
  • Hutton, F.W. 1873 Catalogue of the Marine Mollusca of New Zealand, with diagnoses of the species, Dominion Museum (NZ) Original Description

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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