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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.
Kermadec Islands
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
Forsterian - Otago, Fiordland and Stewart Island
Moriorian - Chatham Islands, Pitt Island
Antipodean - Subantarctic Islands of New Zealand
FW =
L =
N =
North Island
S =
South Island
E =
I =
Mollusca (Phylum) > Gastropoda (Class) > Caenogastropoda (Subclass) > Littorinimorpha (Order) > Tonnoidea (Superfamily) > Tonnidae (Family) > Tonna (Genus)
Genus: Tonnamap >
Tonna cumingii (Reeve, 1849)
Height 90mm, Width 65mm, The species currently classified as Tonna cumingii in New Zealand could possibly be a new/different species or even more than one species. Until further research has been published, the current name of Tonna cumingii is used here
East Coast Northland A
Tonna dolium (Lamarck, 1822) (=maculata Powell not Lamarck)
Height 110mm, Width 95mm
Indo-Pacific, Indian Ocean, Indonesia, Japa, Philippines, Fiji and northern part of North Island A
Tonna lischkeana (Küster, 1857)
Height 215mm
E Africa to Hawaii. Northern New Zealand A
Tonna luteostoma (Küster, 1857)
Height 100mm, Width 85mm
N.Z. Far North. Common in Japan A
Tonna melanostoma (Jay, 1839)
Height 180mm, Width 145mm, Distinguished by dark-brown spreading parietal callus
Hawaiian Islands to Tonga, Society Islands, Melanesia and Northland east coast KA
Tonna perdix (Linnaeus, 1758)
Length 225mm
Indo-Western Pacific, Kermadec Islands and Northland KA
Tonna tankervillii (Hanley, 1860) (=cerevisina Hedley)
Height 250mm, Width 210mm, Common Cask or Tun Shell. Characterised by a deep canaliculate suture
Northland to Hawkes Bay and Mahia Peninsula. Washups on sandy beaches and alive below low tide AC
Tonna tetracotula Hedley, 1919
Height 200mm, Width 150mm
Outer Hauraki Gulf to Bay of Plenty. Also Australia, Queensland to Victoria A
Tonna zonata (Green, 1830) (=olearium Powell)
Height 200mm, Width 155mm
Nortern part of North Island, to western Bay of Plenty. Also Indian Ocean, Japan A