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Taxonomy
Family:
RISSOIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Rissooidea (Superfamily)
> Rissoidae (Family)
> Powellisetia (Genus)
> gradata (Species)
Synonymised Names:
=Anabathron gradatum Suter, 1908
Images: Powellisetia gradata (Suter, 1908)
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Taxonomy
Family:
RISSOIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Rissooidea (Superfamily)
> Rissoidae (Family)
> Powellisetia (Genus)
> gradata (Species)
Synonymised Names:
=Anabathron gradatum Suter, 1908
Details: Powellisetia gradata (Suter, 1908)
Size/Grows to:
Height 1.65mm, Width 1.1mm
Distribution:
Southern South Island as far north as Oamaru, Stewart, Snares and Auckland Islands, Pukaki Rise and western Chatham Rise
Notes:
Marine, Native - Endemic
Distribution Map
 
References and Publications
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.99)
  • Ponder, W.F. 1965 A revision of the New Zealand recent species previously known as Notosetia Iredale, 1915 (Rissoidae, Gastropoda), Records of the Auckland Institute and Museum, 6(2) (p.107)
  • Suter, H. 1908 Additions to the marine molluscan fauna of New Zealand, with descriptions of new species, Proceedings of the Malacological Society of London, 8 (p.32) Original Description

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

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