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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
Bivalvia - Autobranchia - Arcoida - Family: Arcidae

Arcidae: Arcinae

 

Genus: Acar

 
Acar plicata (Dillwyn, 1817)
Kermadec Islands [K.]
 
Acar sandersonae Powell, 1933
Length 20mm, Height 12mm
North, South, Stewart and Chatham Islands. Under stones from low tide to over 200 metres [ACFME.]
Acar sociella (Brookes, 1926)
Length 5mm, Height 2.5mm
North, South and Chatham Islands [AFME.]

Genus: Barbatia

 
Barbatia novaezelandiae (E.A.Smith, 1915)
Height 42mm, Length 75mm, Ark Shell
North, South, Stewart and Chatham Islands. Under stones from low tide to over 90 metres [ACFME.]

Genus: Barbatia (Abarbatia)

 
Barbatia (Abarbatia) trapezina (Lamarck, 1819) (=decussata G.B.Sowerby I)
Kermadec Islands [K.]
 

Genus: Calloarca (Coraliarca)

 
Calloarca (Coraliarca) nuttingi Dall, Bartsch & Rehder, 1938
Kermadec Islands [K.]
 

Genus: Hawaiarca

 
Hawaiarca alia Dall, Bartsch & Rehder, 1938
Kermadec Islands [K.]
 

Arcidae: Anadarinae

 

Genus: Anadara

 
Anadara trapezia (Deshayes, 1839)
Length 75mm, Height 50mm, Sub Fossil
Far North. Spirits Bay. Kohukohu, Hokianga Harbour, and Auckland as subfossil. Also Western Australia to Queensland and Tasmania, Australia, subfossil to recent [A]

Genus: Bathyarca

 
Bathyarca corpulenta (E.A.Smith, 1885) (=orbiculata of authors, not Dall)
Height 28.8mm, Width 24.0mm
Atlantic, Pacific and Antarctic Oceans [K.A]
 
Bathyarca cybaea Hedley, 1906
Length 4mm, Height 3mm
North, South and Stewart Island. Chatham and Snares Islands. Trawled around 45-200 metres [ACFMAnE.]

Genus: Bentharca

 
Bentharca asperula (Dall, 1881)
Worldwide, Eastern Pacific from 430-5005 metres [K.A]