Altenaeum charcoti (Lamy, 1906)
Width 3.5mm, Height 2.5mm
Marine, Native - Endemic
Macquarie Islands. Also South Georgia, South Shetland Islands, South Orkney Islands, Palmer Archipelago and Kerguelen Islands

Arthritica bifurca (Webster, 1908)
Width 6mm, Height 5mm
Marine, Recent, Fossil, Native - Endemic
North Island and northern South Island as far south as Banks Peninsula, from 0-72m

Arthritica crassiformis Powell, 1933
Width 5.5mm, Height 4.5mm
Marine, Native - Endemic, Commensal upon the pholad, rock boring Anchomasa, usually found around the base of the siphon and along the lower mantle edges
North-eastern and south-western North Island and northern South Island as far south as Cape Campbell. Intertidal, from 0m

Arthritica hulmei Ponder, 1965
Width 3.4mm, Height 2.8mm
Marine, Native - Endemic, Commensal with a large polychaete worm, the seamouse, Aphrodita australis
Northern north-western, north-eastern and south-western North Island and northern South Island as far south as Cloudy Bay, from 0-132m

Borniola bidentifera (Powell, 1933)
Width 2.0mm, Height 1.5mm
Marine, Native - Endemic
Eastern and southern North Island. Intertidal, from 0-11m

Borniola decapitata (Powell, 1939)
Width 2.8mm, Height 2mm
Marine, Native - Endemic
Southern South Island, Stewart, Snares, Auckland, Campbell, Bounty and Chatham Islands, from 0-117m

Borniola neozelanica Powell, 1937
Width 4.5mm, Height 3.3mm
Marine, Native - Endemic
King and Middlesex Banks, Three Kings Islands, north-eastern North Island as far south-east as East Cape, and off Nugent Island, Kermadec Islands, from 93-805m

Borniola powelli Crozier, 1966
Width 4.5mm, Height 4mm
Marine, Native - Endemic
Three Kings Islands

Borniola profunda (Dell, 1952)
Width 1.5mm, Height 1.2mm
Marine, Native - Endemic
Challenger Plateau, from 536m

Borniola quadrata (Dell, 1956)
Width 3.5mm, Height 2.8mm
Marine, Native - Endemic
Eastern South Island, Auckland Islands and Chatham Rise, from 141-640m

Borniola reniformis (Suter, 1908)
Width 10mm, Height 7mm
Marine, Native - Endemic
Three Kings, North, South, Stewart, Snares and Chatham Islands, from 0-805m

Borniola taieriensis (Powell, 1939)
Width 2.5mm, Height 2.2mm
Marine, Native - Endemic
South-western South Island, and Stewart, Snares and Chatham Islands, from 0-55m

Draculamya minima Ponder, 1971
Width 1.4mm, Height 1.2mm
Marine, Native - Endemic
Eastern South Island and Stewart Island, from 0-68m

Erycina parva (Deshayes, 1856)
Marine, Native - Endemic
Three Kings, North, South, Stewart and Chatham Islands, from 0-805m

Kellia cycladiformis (Deshayes, 1834)
Width 16mm, Height 13mm
Marine, Native - Endemic
Middlesex and King Banks, and Three Kings, North, South, Stewart, Snares, Auckland and Chatham Islands. Often found inside empty bivalves, from 0-346m

Lasaea australis (Lamarck, 1818)
Marine, Native - Non-endemic
Mahia Peninsula, from 0m

Lasaea hinemoa Finlay, 1928
Width 3.7mm, Height 3mm
Marine, Native - Endemic
Three Kings, North, South, Stewart, Snares, Auckland, Campbell, Antipodes, Bounty and Chatham Islands, from 0-106m

Lasaea maoria (Powell, 1933)
Width 2.4mm, Height 2mm
Marine, Native - Endemic
North-eastern and south-western North Island, Banks Peninsula, south-western South Island, and Chatham Islands, from 0-31m

Lasaea parengaensis Powell, 1935
Width 1.5mm, Height 1.2mm
Marine, Native - Endemic
North and South Islands

Lasaea sp. aff. rubra (Montagu, 1803)
Marine
Kermadec Islands

Montacuta semiradiata Tate, 1889
Width 2.7mm, Height 1.9mm
Marine, Native - Endemic
Three Kings Islands, North Island, eastern and south-western South Island, and Chatham Islands, from 72-1372m

Myllita stowei (Hutton, 1873)
Width 15mm, Height 9mm
Marine, Native - Endemic
Three Kings Islands, North Island and northern South Island as far south as Kaikoura. Attached to the under sides of stones on sand, from 0-188m

Myllita vivens Finlay, 1926
Width 3.3mm, Height 3mm
Marine, Native - Endemic
Three Kings Islands, North Island, far northern and eastern South Island, and Chatham Islands. Shallow sublittoral, from 0-9m

Myllita vivens pinguis (Marwick, 1928)
Width 4.3mm, Height 4mm
Marine, Native - Endemic
Chatham Islands, common in beach drift

Mysella alpha Powell, 1937
Width 2.2mm, Height 1.6mm
Marine, Native - Endemic
Middlesex Bank, Three Kings Islands, off Spirits Bay and North Cape, and Ranfurly Bank, from 68-257m

Mysella beta Powell, 1937
Width 3.3mm, Height 2.8mm
Marine, Native - Endemic
Middlesex Bank, Three Kings Islands, south-western North Island, and Kermadec Islands, from 121-805m

Mysella henryi Fleming, 1948
Width 3.8mm, Height 3mm
Marine, Native - Endemic
South Island. Fiordland

Mysella hounselli (Powell, 1931)
Width 6.3mm, Height 4.3mm
Marine, Recent, Fossil, Native - Endemic
Northern and south-western North Island, and South and Stewart Islands, from 7-786m

Mysella lachlani Dell, 1952
Width 6mm, Height 5mm
Marine, Native - Endemic
Three Kings Islands, northern North Island, Chatham Islands and Mernoo Bank, from 95-805m

Mysella larochei Powell, 1940
Width 7.5mm, Height 5mm
Marine, Native - Endemic
North, South and Stewart Islands, from 0-256m

Mysella macquariensis (Hedley, 1916)
Width 3.3mm, Height 2.7mm
Marine, Native - Endemic
Macquarie Island

Mysella morioria Dell, 1952
Width 7.5mm, Height 5.5mm
Marine, Native - Endemic
Mernoo Bank and Chatham Islands, from 0-238m

Mysella tellinula (Odhner, 1924)
Width 5.2mm, Height 4.2mm
Marine, Native - Endemic
Three Kings Islands, and north-eastern North Island as far south as Whangaruru Harbour. Intertidal, from 0-200m

Mysella unidentata (Odhner, 1924)
Width 3.3mm, Height 2.6mm
Marine, Native - Endemic
South-western North Island, eastern and south-western South Island, and Stewart, Snares, Bounty and Chatham Islands, from 0-476m

Tellimya aupouria (Ponder, 1968)
Width 5mm, Height 3.1mm
Marine, Native - Endemic
Middlesex and King Banks, Three Kings Islands, and north-eastern North Island as far south-east as Ranfurly Bank, from 20-508m

Tellimya benthicola Dell, 1956
Length 3.6mm, Height 2.5mm
Marine, Native - Endemic
Bay of Plenty, eastern South Island and Chatham Islands, from 137-604m

Tellimya reinga Crozier, 1966
Length 12mm, Height 6mm
Marine, Native - Endemic
West Norfolk Ridge, Middlesex Bank, Three Kings Islands, and north-eastern North Island as far south-east as East Cape, from 47-805m