NZ Mollusca

Ischnochiton maorianus Iredale, 1914

Ischnochiton maorianus
Henderson Bay, Far North, under a rock in the low intertidal zone Reproduced courtesy of inaturalist.nz ©tangatawhenua
Ischnochiton maorianus
Henderson Bay, Far North, a very variable species, 35mm Reproduced courtesy of inaturalist.nz ©tangatawhenua
Classification: Mollusca - Polyplacophora - Neoloricata - Chitonida - Ischnochitonidae - Ischnochiton
Family: ISCHNOCHITONIDAE
Synonyms: (=Simplischnochiton Van Belle)
Size/Grows to: Length 44mm, Width 20mm
Distribution: North, South Stewart and Chatham Islands. Intertidal under stones [A.C.F.M.]
Notes: Endemic
Some known Localities
  • NE Point of Great Island, Three Kings Islands, NZ
  • North West Bay, Great Island, Three Kings Islands, NZ
  • South East Bay, Great Island, Three Kings Islands, NZ
  • Off Hinemoa Island, 23 metres, Three Kings Islands, NZ
  • Off West Island, 37 metres, Three Kings Islands, NZ
  • E side of North Cape, Far North, NZ
  • Tapotupotu Bay, Far North, NZ
  • Parengarenga Harbour, Far North, NZ
  • Henderson Bay, Far North, NZ
  • Whatuwhiwhi, Karikari Peninsula, Northland, NZ
  • Hihi Beach, Mangonui, Northland, NZ
  • Oke Bay, Bay of Islands, Northland, NZ
  • Whangamumu Bay, Northland, NZ
  • Russell, Bay of Islands, Northland, NZ
  • Bland Bay, Northland, NZ
  • Oakura, Whangarei, Northland, NZ
  • Reotahi, Whangarei Heads, Northland, NZ
  • Taurikura Bay, Whangarei Heads, Northland, NZ
  • Marsden Point, Whangarei, Northland, NZ
  • Urquharts Bay, Whangarei Heads, Northland, NZ
  • Port Fitzroy, Great Barrier Island, Hauraki Gulf, NZ
  • Near Red Cliff Cove, Great Barrier Island, Hauraki Gulf, NZ
  • Tinopai, Kaipara Harbour, Northland, NZ
  • Oruawharo Bay, Great Barrier Island, Hauraki Gulf, NZ
  • Goat Island, Leigh, Northland, NZ
  • Off Cape Rodney, Leigh, Northland, NZ
  • Mathesons Bay, Leigh, Northland, NZ
  • Ti Point, Leigh, Auckland, NZ
  • Takatu Point, E of Warkworth, Auckland, NZ
  • Waiwera, Northland, NZ
  • Chinaman Bay, Tiritiri Matangi Island, Hauraki Gulf, NZ
  • Te Haruhi Bay, Whangaparoa Peninsula, Auckland, NZ
  • Channel between Motuhoropapa & Otata islands, The Noises, Hauraki Gulf, NZ
  • Deep Creek, Torbay, Auckland, NZ
  • Opito Point, NE of Whitianga, Coromandel, NZ
  • Milford Reef, Auckland, NZ
  • E coast, Motutapu Island, Auckland, NZ
  • Narrow Neck Reef, Auckland, NZ
  • Te Tokaroa (Meola) Reef, Point Chevalier, Auckland, NZ
  • Kohimarama, Auckland, NZ
  • Howick Beach, Auckland, NZ
  • Waikowhai, Manukau Harbour, Auckland, NZ
  • Whatipu, Manukau Entrance, Auckland, NZ
  • Ohui, N of Whangamata, Coromandel, NZ
  • Hautura (Clark's) Island, Whangamata, Coromandel, NZ
  • South East Bay, Mayor Island, Bay of Plenty, NZ
  • Off White Island, Bay of Plenty, NZ
  • Te Piki, near Cape Runaway, (Castlecliffian, upper Pleistocene), Bay of Plenty, NZ (Fossil) *2
  • Waihau Bay, East Cape, NZ
  • Pilot Bay, Tauranga, Bay of Plenty, NZ
  • Pilot Bay, rocks around Maori Warrior, Mount Maunganui, Bay of Plenty, NZ
  • Western Channel, Tauranga Harbour, Bay of Plenty, NZ
  • W of East Cape, NZ *2
  • Whanarua Bay, SW of Cape Runaway, Bay of Plenty, NZ
  • Newdicks Beach, Maketu, SE of Tauranga, Bay of Plenty, NZ
  • Omaio Bay, Te Kaha, Bay of Plenty, NZ
  • Otarawairere Bay, Ohope, Bay of Plenty, NZ *2
  • Below old reservoir in stream at foot of Whakatane - Ohope Road, Ohope, Bay of Plenty, NZ (Fossil) *2
  • Ohope Beach, Bay of Plenty, NZ
  • Te Maika, Kawhia Harbour, Waikato, NZ
  • Mahia Peninsula, Hawkes Bay, NZ
  • Near Long Point, Mahia Peninsula, Hawkes Bay, NZ
  • Warea, SW of New Plymouth, Taranaki, NZ
  • Rocky headland adjacent to Maui onshore installation, Oaonui, SW of New Plymouth, Taranaki, NZ *2
  • Westshore, Napier, Hawkes Bay, NZ
  • Punapaua platform, S of Paturau River, W of Collingwood, Nelson, NZ *2
  • Totaranui, Nelson, NZ
  • Waipori's Mark, N of Castlepoint, Wairarapa, NZ
  • Off Motungarara (Fishermans) Island, off Kapiti Island, NZ
  • Paekakariki Beach, Wellington, NZ
  • Pukerua Bay, Wellington, NZ
  • Kaiteriteri Bay, W Nelson, NZ
  • Karehana Bay, Plimmerton, Wellington, NZ
  • Clova Bay, Manaroa, Pelorus Sound, Marlborough Sounds, NZ
  • Jacketts Island channel, Motueka, Tasman, NZ
  • Blumine Island, beside Patten Passage, Queen Charlotte Sound, Marlborough Sounds, NZ *2
  • Arapawa Island, Queen Charlotte Sound, Marlborough Sounds, NZ
  • Makara, Wellington, NZ
  • Tory Channel, Marlborough Sounds, NZ
  • Flat Point, SE of Masterton, Wairarapa, NZ *2
  • Somes Island, Wellington Harbour, NZ
  • Karaka Bay, Wellington, NZ
  • Breaker Bay, Wellington, NZ
  • Lyall Bay, Wellington, NZ *2
  • Island Bay, Wellington, NZ
  • S side, Taputeranga Island, Island Bay, Wellington, NZ
  • Te Awaiti, NE of Cape Palliser, Wairarapa, NZ
  • Marfells Beach, near Cape Campbell, Marlborough, NZ
  • Cape Campbell, Marlborough, NZ
  • 'Seal Rock', Kaikoura Peninsula, Canterbury, NZ
  • Motunau Island, 25 metres, South of Kaikoura, Canterbury, NZ
  • Taylors Mistake (Te Onepoto), near Lyttelton, Canterbury, NZ
  • Lyttelton Harbour, Canterbury, NZ
  • Abbey Rocks, 7-11 metres, NE of Haast, Westland, NZ *2
  • N side, Okains Bay, Banks Peninsula, Canterbury, NZ
  • Off Open Bay Islands, W of Haast, Westland, NZ
  • Red Bluff, Chatham Islands, NZ
  • Waitangi, Chatham Islands, NZ
  • S side of Smoothwater Bay, SW of Haast, Westland, NZ *2
  • Owenga, Chatham Islands, NZ
  • Glory Bay, Pitt Island, Chatham Islands, NZ
  • St Anne Bay, entrance to Milford Sound, 10-14 metres, Fiordland, NZ *2
  • Point SE of Dale Point, S side outer Milford Sound, Fiordland, NZ *2
  • Kettle Point, middle Milford Sound, Fiordland, NZ
  • Near McDonald's Creek, inner Bligh Sound, Fiordland, NZ *2
  • Oamaru, Northern Otago, NZ
  • Off Adieu Point, Dagg Sound, Fiordland, NZ *2
  • Shag Point, Otago, NZ
  • Off Chatham Point, 42 metres, upper Breaksea Sound, Fiordland, NZ *2
  • Waikouaiti River estuary, Karitane, NE of Dunedin, Otago, NZ
  • S side of Wet Jacket Arm entrance, 42 metres, Fiordland, NZ *2
  • Sandfly Bay, Otago Peninsula, NZ
  • South Port, Chalky Inlet, Fiordland, NZ
  • Cording Islets, Preservation Inlet, 32 metres, Fiordland, NZ
  • Bungaree Beach, NW of Oban, Stewart Island, NZ
  • Horseshoe Bay, Paterson Inlet, Stewart Island, NZ
  • Golden Bay, Stewart Island, NZ
  • The Nugget, Ringaringa, Stewart Island, NZ
more localities
References:
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.22)

Note: Localities are approximate, and represent only some of the known localities for the species.

*2 © Museum of New Zealand Te Papa Tongarewa CC BY-NC-ND