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Mactra ordinaria E.A. Smith, 1898 Width 19mm, Height 12mm 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 North Island and northern half of South Island. In mud in shallow water ACE.
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 approximation of the range of each species within New Zealand.
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
Cookian - Lower North Island and the northern part of the South Island