Key to 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 approxomation 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
E =
Endemic
I =
Introduced

Mactra (Maorimactra) ordinaria (E.A.Smith, 1898)

Classification:Bivalvia - Heterodonta - Veneroida
Family:MACTRIDAE: MACTRINAE
Size/Grows to:Length 13mm, Height 9.5mm
Distribution:North Island and northern half of South Island. In mud in shallow water
Geographical Range:AC
Notes:
Endemic. Sculpture of very fine and dense concentric lirations, slightly stronger at the sides
References and Publications:
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.414)

Note: Localities are approximate, and represent only some of the known localities for the species.

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