Arcuatula senhousia Benson, 1842
Length 36mm, Height 16mm
Asian Mussel, Marine, Non-indigenous
Worldwide. North-eastern North Island, New Zealand. Clustered in dense masses in muddy harbours, from 0-6m

Xenostrobus neozelanicus (Iredale, 1915)
Length 34mm, Height 16mm
Little Black Mussel, Marine, Native - Non-endemic
North, South, Stewart, Snares and Auckland Islands. Also Western Australia. On open coasts at low tide, from 0-42m

Xenostrobus securis (Lamarck, 1819)
Length 35mm, Height 17mm
Marine
Northern and south-western North Island, northern and south-western South Island and Chatham Islands. Also Western Australia to Queensland. Estuarine areas, from 0m

Adipicola osseocola (Dell, 1987)
Length 24mm, Height 10mm
Marine, Native - Endemic
Chatham Rise and south-eastern South Island. On whale skulls, from 583-900m

Bathymodiolus manusensis Hashimoto & Furuta, 2007
Vent Mussel, Marine
Kermadec Ridge, SSW of Tonga, Monowai Caldera, from 1038-1143m

Bathymodiolus septemdierum Hashimoto & Okutani, 1994
Marine
Philippine Sea to south of Tonga

Benthomodiolus lignocola Dell, 1987
Marine, Native - Endemic
North Island and Chatham Rise. On bored logs, from 545-1174m

Gigantidas gladius B.A. Marshall, 2003
Length 316mm, Height 54mm
Giant Vent Mussel, Marine, Native - Endemic
Submarine volcanoes, Kermadec Ridge and south-eastern North Island, from 312-884m

Gigantidas tangaroa (Cosel & B.A. Marshall, 2003)
Length 200mm
Marine, Native - Endemic
South-eastern North Island, from active submarine volcanoes. Off Cape Turnagain, from 819-920m

Idas japonicus (Habe, 1976)
Marine, Native - Non-endemic
Southwest Pacific, benthic. Bay of Plenty, NZ, from 1075-1100m

Idas washingtonius (F.R. Bernard, 1978)
Marine, Native - Non-endemic
Southwest Pacific, benthic. North and South Islands and Chatham Rise, from 490-1549m

Terua arcuatilis (Dell, 1995)
Length 30mm, Height 8mm
Marine, Native - Endemic
Challenger Plateau, Chatham Rise and N of Auckland Islands. On whale bone, from 379-1242m

Vulcanidas insolatus B.A. Marshall, 2010
Length 178mm, Width 92mm
Marine, Native - Endemic, Near active volcanic venting sites
Kermadec Ridge. Macauley Caldera and Giggenback volcano, from 160-332m

Rhomboidella radians (Suter, 1908)
Height 6mm, Width 4.2mm
Marine, Native - Endemic
Kermadec Islands, Middlesex and King Banks, Three Kings Islands, and north-eastern North Island as far south-east as Ranfurly Bank, from 25-805m

Dacrydium pelseneeri Hedley, 1906
Width 1.5mm, Height 2.2mm
Marine, Native - Endemic
Middlesex and King Banks, Three Kings Islands and north-eastern North Island, from 49-805m

Zelithophaga truncata (Gray, 1843)
Length 50mm, Height 15mm
Marine, Native - Endemic
North and South Islands. Boring into soft rock, from 0-282m

Aulacomya maoriana (Iredale, 1915)
Length 60mm, Width 30mm
Ribbed Mussel, Marine, Native - Endemic
Three Kings Islands (shells), southern Bay of Plenty (small shells attached to beached algal holdfasts), south-eastern North Island, and South, Stewart, Snares, Auckland, Campbell, Antipodes, Bounty and Chatham Islands

Modiolus areolatus (A.A. Gould, 1850)
Length 115mm, Width 70mm
Marine, Native - Non-endemic
King Bank and Three Kings, North, South, Stewart, Snares, Auckland, Campbell, Antipodes, Bounty and Chatham Islands, from 0-485m

Modiolus auriculatus F. Krauss, 1848
Marine, Native - Non-endemic
SW Pacific, Lord Howe Island, Norfolk and Kermadec Islands, from 0m

Gregariella barbata (Reeve, 1858)
Length 11mm, Width 5mm
Marine, Native - Non-endemic
King Bank, and Kermadec Islands, Three Kings, North, South, Stewart, Snares, Chatham Islands and Mernoo Bank. Also Western Australia to New South Wales, from 0-805m

Musculus cumingianus (Reeve, 1857)
Marine
Kermadec Islands

Musculus impactus (Hermann, 1782)
Length 47mm, Width 28mm
Nesting Mussel, Marine, Native - Non-endemic
North, South, Stewart and Chatham Islands. In clumps under rocks below low tide, from 0-201m

Mytilus planulatus Lamarck, 1819
Length 150mm, Width 63mm
Blue Mussel, Marine, Native - Non-endemic
Kermadec, North, South, Stewart, Chatham, Auckland and Campbell Islands, from 0-42m

Perna canaliculus (Gmelin, 1791)
Length commonly up to 160mm, with records over 240mm
Green Mussel, Green Lipped Mussel, Kutai, Marine, Native - Endemic
North, South, Stewart and Chatham Islands, from 0-53m

Septifer cumingii Récluz, 1849
Marine, Native - Non-endemic
Kermadec Islands, King Bank, Three Kings Islands and north-eastern North Island, from 0-287m