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Taxonomy
Family:
CALYPTRAEIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Calyptraeoidea (Superfamily)
> Calyptraeidae (Family)
> Sigapatella (Genus)
> tenuis (Species)
Genus Synonyms:
=Calyptraea (Sigapatella) Lesson, 1831
=Clypeola Gray, 1868
=Sigapatella (Sigapatella) Lesson, 1831
=Sigapatella (Spirogalerus) Finlay & Marwick, 1937
=Spirogalerus Finlay & Marwick, 1937
=Zegalerus Finlay, 1926
Synonymised Names:
=Clypeola tenuis Gray, 1867
=Sigapatella (Sigapatella) tenuis (Gray, 1867) accepted, alternate representation
=Trochita tenuis (Gray, 1867)
=Zegalerus tenuis (Gray, 1867)
Images: Sigapatella tenuis (Gray, 1867)
In beach drift, Ngunguru, Northland, NZ. 15mm
Taxonomy
Family:
CALYPTRAEIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Calyptraeoidea (Superfamily)
> Calyptraeidae (Family)
> Sigapatella (Genus)
> tenuis (Species)
Genus Synonyms:
=Calyptraea (Sigapatella) Lesson, 1831
=Clypeola Gray, 1868
=Sigapatella (Sigapatella) Lesson, 1831
=Sigapatella (Spirogalerus) Finlay & Marwick, 1937
=Spirogalerus Finlay & Marwick, 1937
=Zegalerus Finlay, 1926
Synonymised Names:
=Clypeola tenuis Gray, 1867
=Sigapatella (Sigapatella) tenuis (Gray, 1867) accepted, alternate representation
=Trochita tenuis (Gray, 1867)
=Zegalerus tenuis (Gray, 1867)
Details: Sigapatella tenuis (Gray, 1867)
Size/Grows to:
Length 23mm, Height 10mm
Distribution:
North, South, Stewart and Chatham Islands, and Mernoo Bank. 0-604 metres, attached to hard substrate
Notes:
Marine, Native - Endemic, Oblique spiral threads on the teleoconch, smooth periostracum when not worn off
Distribution Map
 
References and Publications
  • Marshall, B.A. 2003 A review of the Recent and late Cenozoic Calyptraeidae of New Zealand (Mollusca: Gastropoda), The Veliger, 46(2) (p.139)
  • Cumber, R.A. Aug/1981 An unusual form of Zegalerus sp. from Great Exhibition Bay, Poirieria, 11(1) (p.5)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.149)
  • Gray, J.E. 1868 Notes on the specimens of Calyptraeidae in Mr. Cuming's collection, Proceedings of the Zoological Society of London (p.735) Original Description

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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
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