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
N =
North Island
S =
South Island
E =
Endemic
I =
Introduced

Microcardium trapezoidale Poutiers, 2006

Classification:Bivalvia - Heterodonta - Veneroida
Family:CARDIIDAE: PROTOCARDIINAE
Distribution:Kermadec Islands
Geographical Range:K.
References and Publications:
  • ter Poorten, J.J. 2013: Revision of the Recent species of the genus Nemocardium Meek, 1876 (Bivalvia, Cardiidae), with the descriptions of three new species, Basteria, 77 (p.65)
  • Poutiers, J.M. 2006: Two new species of Protocardiine cockles (Mollusca, Bivalvia, Cardiidae) from the tropical Southwest Pacific, Zoosystema, 28 (p.644)