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Taxonomy
Family:
HYDROCENIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Neritimorpha (Subclass)
> Cycloneritida (Order)
> Hydrocenoidea (Superfamily)
> Hydrocenidae (Family)
> Georissa (Genus)
> purchasi (Species)
Genus Synonyms:
=Chondrella Pease, 1871
=Georissa (Chondrella) Pease, 1871
=Georissa (Georissa) W. T. Blanford, 1864
=Georissa (Georissopsis) Pilsbry & Hirase, 1908
=Omphalorissa Wenz, 1938
=Petrorissa Habe, 1958
Synonymised Names:
=Hydrocena purchasi L. Pfeiffer, 1861
=Omphalorissa purchasi (L. Pfeiffer, 1862)
Images: Georissa purchasi (L. Pfeiffer, 1862)
Waiwhetu, Haywards Easter Hills Scenic Reserve, Lower Hutt, Wellington, NZ. 1.9mm. Reproduced courtesy of iNaturalist.nz ©openlabnz (D.J.Roscoe)
Top view - Waiwhetu, Haywards Easter Hills Scenic Reserve, Lower Hutt, Wellington, NZ. 1.9mm. Reproduced courtesy of iNaturalist.nz ©openlabnz (D.J.Roscoe)
Base view - Waiwhetu, Haywards Easter Hills Scenic Reserve, Lower Hutt, Wellington, NZ. 1.9mm. Reproduced courtesy of iNaturalist.nz ©openlabnz (D.J.Roscoe)
Taxonomy
Family:
HYDROCENIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Neritimorpha (Subclass)
> Cycloneritida (Order)
> Hydrocenoidea (Superfamily)
> Hydrocenidae (Family)
> Georissa (Genus)
> purchasi (Species)
Genus Synonyms:
=Chondrella Pease, 1871
=Georissa (Chondrella) Pease, 1871
=Georissa (Georissa) W. T. Blanford, 1864
=Georissa (Georissopsis) Pilsbry & Hirase, 1908
=Omphalorissa Wenz, 1938
=Petrorissa Habe, 1958
Synonymised Names:
=Hydrocena purchasi L. Pfeiffer, 1861
=Omphalorissa purchasi (L. Pfeiffer, 1862)
Details: Georissa purchasi (L. Pfeiffer, 1862)
Size/Grows to:
Height 2.0mm, Width 1.0mm
Distribution:
North and South Islands, and Three Kings Islands
Notes:
Land
Distribution Map
 
References and Publications
  • Goulstone, J.F., Mayhill, P.C., Parrish, G.R. 1993 An Illustrated Guide to the Land Mollusca of the Te Paki ecological region, Northland, New Zealand, New Zealand Journal of Zoology, 34 (p.6)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.80)

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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