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Species List for Subfamily: Mactrinae
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Mollusca (Phylum) > Bivalvia (Class) > Autobranchia (Subclass) > Heteroconchia (Infraclass) > Euhetrodonta (Subterclass) > Imparidentia (Superorder) > Venerida (Order) > Mactroidea (Superfamily) > Mactridae (Family) > Mactrinae (Subfamily)
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  • Subfamily: Mactrinae

  • Crassula aequilatera (Deshayes, 1854)
    Width 75mm, Height 55mm
    Diamond Surf Clam, Triangle Shell, Marine, Native - Endemic
    North, South and Stewart Island. In shallow water off sandy beaches
    ACF
  • Cyclomactra ovata (Gray, 1843)
    Width 80mm, Height 62mm
    Marine, Native - Endemic
    Northern and south-western North Island; northern, eastern and southern South Island, and Stewart, Auckland and Chatham Islands. Buried deeply in soft mud
    ACFMAn
  • Cyclomactra tristis (Reeve, 1854)
    Width 60mm, Height 55mm
    Marine, Native - Endemic, Buried in mud at low tide
    North Island as far north as Auckland, northern South Island as far south as Christchurch, and Chatham Islands. Intertidal
    ACFM
  • Mactra ordinaria E.A. Smith, 1898
    Width 19mm, Height 12mm
    Marine, Native - 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 South Island as far south as Dunedin. In mud in shallow water
    ACF
  • Oxyperas bellianum (W.R.B. Oliver, 1915)
    Marine, Native - Endemic
    Kermadec Islands
    K
  • Oxyperas elongatum (Quoy & Gaimard, 1835)
    Length 111mm, Width 65mm
    Long Trough Shell, Marine, Native - Endemic
    King Bank and Three Kings Islands, north-eastern and south-western North Island, far northern and eastern South Island, Stewart and Chatham Islands, and Mernoo Bank. Shallow water to over 200 metres
    ACFM
  • Scalpomactra scalpellum (Reeve, 1854)
    Length 34mm, Height 20mm
    Marine, Native - Endemic
    Three Kings, North, South, Stewart and Chatham Islands, and Mernoo Bank
    ACF
  • Spisula discors Gray, 1873
    Width 90mm, Height 80mm, Thickness 45mm
    Large Trough Shell, Marine, Native - Endemic, Darker, more inflated than Mactra murchisoni. Colour white under a dark brown periostracum
    North-eastern and southern North Island, northern and southern South Island
    ACF
  • Spisula murchisoni Deshayes, 1854
    Width 98mm, Height 80mm
    Marine, Native - Endemic, Wider, less inflated than Mactra discors. More laterally ovate, inequilateral, has transverse plications on the lateral teeth, and the periostracum is always pale straw colour
    North Island and northern and southern South Island. On exposed sandy beaches
    ACF
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
R =
Recent
Sf =
Subfossil
Fo =
Fossil