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Taxonomy
Family:
LASAEIDAE
Full Classification:
Mollusca (Phylum)
> Bivalvia (Class)
> Autobranchia (Subclass)
> Heteroconchia (Infraclass)
> Euhetrodonta (Subterclass)
> Imparidentia (Superorder)
> Galeommatida (Order)
> Galeommatoidea (Superfamily)
> Lasaeidae (Family)
> Arthritica (Genus)
> crassiformis (Species)
Images: Arthritica crassiformis Powell, 1933
Holotype, collected Mahina Bay, Wellington, NZ (M.001892). 3.5mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Holotype, collected Mahina Bay, Wellington, NZ (M.001892). 3.5mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Holotype, collected Mahina Bay, Wellington, NZ (M.001892). 3.5mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Taxonomy
Family:
LASAEIDAE
Full Classification:
Mollusca (Phylum)
> Bivalvia (Class)
> Autobranchia (Subclass)
> Heteroconchia (Infraclass)
> Euhetrodonta (Subterclass)
> Imparidentia (Superorder)
> Galeommatida (Order)
> Galeommatoidea (Superfamily)
> Lasaeidae (Family)
> Arthritica (Genus)
> crassiformis (Species)
Details: Arthritica crassiformis Powell, 1933
Size/Grows to:
Width 5.5mm, Height 4.5mm
Distribution:
North-eastern and south-western North Island and northern South Island as far south as Cape Campbell. Intertidal, from 0m
Notes:
Marine, Native - Endemic, Commensal upon the pholad, rock boring Anchomasa, usually found around the base of the siphon and along the lower mantle edges
Distribution Map
 
References and Publications
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.391)
  • Gardner, N.W. Jun/1974 The genus Arthritica Finlay, 1927 - Small Commensal Bivalves, Poirieria, 7(4) (p.78)
  • Powell, A.W.B. 1933 On five new species of recent New Zealand Mollusca, Proceedings of the Malacological Society of London, 20(5) (p.195) Original Description

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