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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 =
E =
I =
Polyplacophora - Loricata - Chitonida - Family: Chitonidae

Chitonidae: Chitoninae


Genus: Chiton

Chiton glaucus Gray, 1828
Length 55mm, Width 35mm, Endemic
North, South and Stewart Island. Intertidal. Introduced to Tasmania and now established there [ACFE.]

Genus: Rhyssoplax

Rhyssoplax aerea (Reeve, 1847) (=huttoni Suter, =clavata Suter, =suteri Iredale)
Length 40mm, Width 23mm, Endemic
North, South, Stewart and Auckland Islands. From low tide under stones in coastal situations [ACFAnE.]
Rhyssoplax canaliculata (Quoy & Gaimard, 1835)
Length 26mm, Width 15mm
North, South and Stewart Island [ACFM]
Rhyssoplax exasperata Iredale, 1914
Kermadec Islands. At shallow subtidal depths under stones [K.E.]
Rhyssoplax stangeri (Reeve, 1847)
Length 20mm, Width 12mm, Endemic
North and South Island. At low tide and shallow water [ACFE.]

Genus: Sypharochiton

Sypharochiton aorangi (Creese & O'Neill, 1987)
Length 15mm, Endemic
Northern NZ offshore islands, Three Kings, Poor Knights, Aldermen Islands [AE.]
Sypharochiton pelliserpentis Quoy & Gaimard, 1835
Length 42mm, Width 26mm
North, South, Stewart and Chatham Islands. Above mid-tide level on and under stones [ACFM]
North, South, Stewart and also recently recorded from the Chatham Islands [ACFME.]
Sypharochiton themeropis (Iredale, 1914)
Kermadec Islands. Intertidal and immediate subtidal in rock crevices [K.E.]
Sypharochiton torri (Suter, 1907)
Length 10mm, Width 6mm, Endemic
South Island. Bluff and Stewart Island [FE.]

Chitonidae: Toniciinae


Genus: Onithochiton

Onithochiton neglectus Rochebrune, 1881 (=marmoratus Wissel, =chathamensis Dell, =opiniosus Iredale & Hull)
Length 47mm, Width 28mm, Endemic
North, South, Stewart, Snares and Chatham Islands. Low tide on underside of boulders [ACFMAnE.]
Length 30mm, Width 15mm, Endemic
Auckland, Campbell and Antipodes Islands [AnE.]
Onithochiton oliveri (Iredale, 1914)
Kermadec Islands. Intertidal in rock crevices [K.E.]