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Taxonomy
Family: Subfamily:
CHAROPIDAE: THERASIINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Heterobranchia (Subclass)
> Euthyneura (Infraclass)
> Tectipleura (Subterclass)
> Eupulmonata (Superorder)
> Stylommatophora (Order)
> Helicina (Suborder)
> [unassigned] Helicina (Infraorder)
> Punctoidea (Superfamily)
> Charopidae (Family)
> Therasiinae (Subfamily)
> Thalassohelix (Genus)
> chathamensis (Species)
Genus Synonyms:
=Flammulina (Thalassohelix) Pilsbry, 1892
=Gerontia (Thalassohelix) Pilsbry, 1892
Synonymised Names:
=Therasia antipoda chathamensis Suter, 1909
Images: Thalassohelix chathamensis (Suter, 1909)
Syntype, collected no other data, NZ (M.088203). ~7mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Syntype, collected no other data, NZ (M.088203). ~7mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Syntype, collected no other data, NZ (M.088203). ~7mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Collected on Chatham Islands, NZ (MA73069). © Auckland Museum (CC-BY)
Collected on Chatham Islands, NZ (MA73069). © Auckland Museum (CC-BY)
Collected on Chatham Islands, NZ (MA73069). © Auckland Museum (CC-BY)
Taxonomy
Family: Subfamily:
CHAROPIDAE: THERASIINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Heterobranchia (Subclass)
> Euthyneura (Infraclass)
> Tectipleura (Subterclass)
> Eupulmonata (Superorder)
> Stylommatophora (Order)
> Helicina (Suborder)
> [unassigned] Helicina (Infraorder)
> Punctoidea (Superfamily)
> Charopidae (Family)
> Therasiinae (Subfamily)
> Thalassohelix (Genus)
> chathamensis (Species)
Genus Synonyms:
=Flammulina (Thalassohelix) Pilsbry, 1892
=Gerontia (Thalassohelix) Pilsbry, 1892
Synonymised Names:
=Therasia antipoda chathamensis Suter, 1909
Details: Thalassohelix chathamensis (Suter, 1909)
Size/Grows to:
Width 7mm, Height 4.5mm
Distribution:
Chatham Islands
Geographical Range:
L.
Notes:
Land, Native - Endemic
Distribution Map
 
References and Publications
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.317)
  • Suter, H. 1909 Description of new species and subspecies of New Zealand Mollusca, with notes on a few species, Proceedings of the Malacological Society of London, 8 (p.259) 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