Grandicrepidula collinae B.A. Marshall, 2003
Length 48mm, Width 22mm
Marine, Native - Endemic
Eastern Northland southward to the Snares. Found behind outer lip of living or dead/hermit-crab Gastropod shells, 175-590 metres

Maoricrypta costata (G.B. Sowerby I, 1824)
Length 60mm, Width 40mm
Ribbed Slipper Shell, Marine, Native - Endemic
Northland to Mahia, living intertidally to 47 metres, attached to undersides of rocks and on living Perna canaliculus

Maoricrypta kopua (B.A. Marshall, 2003)
Length 28mm
Marine, Native - Endemic, Animal whitish, translucent
Three Kings Islands, and north-eastern North Island as far south-east as Ranfurly Bank. Approx. 80-800 metres. Living within apertures of dead/hermit crabbed Gastropods

Maoricrypta monoxyla (Lesson, 1831)
Length 30mm, Width 25mm
Smooth Slipper Shell, Marine, Native - Endemic, Yellow animal, consistently lives on the outside of shells
Northern North Island as far south-east as Cape Runaway, intertidal to about 15 metres

Maoricrypta sodalis B.A. Marshall, 2003
Length 37mm, Width 20mm
Marine, Native - Endemic, White animal. Typically found within apertures of dead gastropods
North, South, Stewart and Snares Island, intertidally to 925 metres

Maoricrypta youngi Powell, 1940
Length 29mm, Width 22mm, Height 8mm
Marine, Native - Endemic
North Cape to Cook Strait, living on Gastropods, at low tide to 88 metres

Sigapatella novaezelandiae (Lesson, 1831)
Length 42mm, Height 25mm
Circular Slipper Shell, Marine, Native - Endemic
Three Kings, North, South, Stewart, Snares, Auckland, Campbell, Bounty and Chatham Islands, and Mernoo Bank. Living intertidally to 200 metres, attached to hard substrate

Sigapatella spadicea Boshier, 1961
Length 21mm, Width 18mm
Marine, Native - Endemic, Spinose surface periostracum/epidermis
North, South and Stewart Island. 4-533 metres attached to hard substrate/shells

Sigapatella superstes Fleming, 1958
Length 30mm, Height 12mm
Marine, Native - Endemic, Granulose surface pattern
Three Kings Islands, and north-eastern North Island as far south as The Aldermen Islands. 0-805 metres

Sigapatella tenuis (Gray, 1867)
Length 23mm, Height 10mm
Marine, Native - Endemic, Oblique spiral threads on the teleoconch, smooth periostracum when not worn off
North, South, Stewart and Chatham Islands, and Mernoo Bank. 0-604 metres, attached to hard substrate

Sigapatella terraenovae Peile, 1924
Length 34mm, Height 20mm
Marine, Native - Endemic
Off Three Kings Islands, Far North and Ranfurly Bank, East Cape. Living attached to hard substrate, 27-93 metres