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Taxonomy
Family: Subfamily:
MACTRIDAE: MACTRINAE
Full Classification:
Mollusca (Phylum)
> Bivalvia (Class)
> Autobranchia (Subclass)
> Heteroconchia (Infraclass)
> Euhetrodonta (Subterclass)
> Imparidentia (Superorder)
> Venerida (Order)
> Mactroidea (Superfamily)
> Mactridae (Family)
> Mactrinae (Subfamily)
> Mactra (Genus)
> ordinaria (Species)
Genus Synonyms:
=Mactra (Maorimactra) Finlay, 1928 accepted, alternate representation
Synonymised Names:
=Mactra (Maorimactra) ordinaria E.A. Smith, 1898 accepted, alternate representation
=Mactra elegans Hutton, 1873
=Mactra triangulare Hector, 1870
Species Images: Mactra ordinaria E.A. Smith, 1898
In beach drift, Tokerau Beach, Northland, NZ. 14mm
Taxonomy
Family: Subfamily:
MACTRIDAE: MACTRINAE
Full Classification:
Mollusca (Phylum)
> Bivalvia (Class)
> Autobranchia (Subclass)
> Heteroconchia (Infraclass)
> Euhetrodonta (Subterclass)
> Imparidentia (Superorder)
> Venerida (Order)
> Mactroidea (Superfamily)
> Mactridae (Family)
> Mactrinae (Subfamily)
> Mactra (Genus)
> ordinaria (Species)
Genus Synonyms:
=Mactra (Maorimactra) Finlay, 1928 accepted, alternate representation
Synonymised Names:
=Mactra (Maorimactra) ordinaria E.A. Smith, 1898 accepted, alternate representation
=Mactra elegans Hutton, 1873
=Mactra triangulare Hector, 1870
Details: Mactra ordinaria E.A. Smith, 1898
Size/Grows to:
Length 15mm, Height 10mm
Distribution:
North Island and northern half of South Island. In mud in shallow water
Geographical Range:
ACE.
Notes:
Marine, Endemic, Sculpture of very fine and dense concentric lirations, slightly stronger at the sides. Distinguished from juvenile discors by the lack of a posterior ridge
Distribution Map
 
References and Publications

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

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
E =
Endemic
I =
Introduced
R =
Recent
Sf =
Subfossil
Fo =
Fossil
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