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