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Key to Geographical Ranges
The symbols K.A.C.F.M.An. are used to indicate the geographical range of the species. They have been adopted to give an approxomation of the range of each species within New Zealand.
K=
Kermadec Islands
A=
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
C=
Cookian - Lower North Island and the northern part of the South Island
F=
Forsterian - Otago, Fiordland and Stewart Island
M=
Moriorian - Chatham Islands, Pitt Island
An=
Antipodean - Subantarctic Islands of New Zealand
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
E =
Endemic
I =
Introduced
R =
Recent
Sf =
Subfossil
Fo =
Fossil
Gastropoda (Phylum) > Mollusca (Subphylum) > Caenogastropoda (Subclass) > Littorinimorpha (Order) > Calyptraeoidea (Superfamily) > Calyptraeidae (Family)
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Calyptraeidae
 
Genus: Grandicrepidulamap >
Grandicrepidula collinae Marshall, 2003
Length 48mm, Width 22mm, Marine, Endemic
Eastern Northland southward to the Snares. Found behind outer lip of living or dead/hermit-crab Gastropod shells, 175-590 metres ACFE.
Genus: Maoricryptamap >
Maoricrypta costata (G.B. Sowerby I, 1824)
Length 60mm, Width 40mm, Ribbed Slipper Shell. Marine, Endemic
Northland to Mahia, living intertidally to 47 metres, attached to undersides of rocks and on living Perna canaliculus ACE.
Maoricrypta kopua (Marshall, 2003)
Length 28mm, Marine, Endemic. Animal whitish, translucent
Three Kings Islands to East Cape, 78-805 metres. Living within apertures of dead/hermit crabbed Gastropods AE.
Maoricrypta monoxyla (Lesson, 1831)
Length 30mm, Width 25mm, Smooth Slipper Shell. Marine, Endemic
North Cape to Cape Runaway. Yellow animal, consistently lives on the outside of shells, intertidally to about 15 metres ACE.
Maoricrypta sodalis Marshall, 2003 (=monoxyla of authors not Lesson, in part)
Length 37mm, Width 20mm, Marine, Endemic. White animal
North, South, Stewart, and Snares Islands, intertidally to 925 metres. Typically within apertures of dead gastropods ACFE.
Maoricrypta youngi Powell, 1940 (=profunda Beu & Maxwell not Hutton)
Length 27mm, Width 22mm, Height 8mm, Marine, Endemic
North Cape to Cook Strait, living on Gastropods, at low tide to 88 metres ACE.
Genus: Sigapatellamap >
Length 42mm, Height 25mm, Circular Slipper Shell. Marine, Endemic
North, South, Stewart, Chatham, Auckland, Snares and Campbell Islands. Living intertidally to 200 metres, attached to hard substrate ACFMAnE.
Sigapatella spadicea Boshier, 1961
Length 21mm, Width 18mm, Marine, Endemic. Spinose surface periostracum/epidermis
North, South and Stewart Island. 4-533 metres attached to hard substrate/shells ACFE.
Sigapatella superstes Fleming, 1958
Width 28mm, Height 12mm, Marine, Endemic. Granulose surface pattern
Off Three Kings Islands and off Northern tip of North Island. (1 juvenile off Aldermen Islands), 0-805 metres AE.
Sigapatella tenuis (Gray, 1867)
Width 16mm, Height 9mm, Marine, Endemic. Oblique spiral threads on the teleoconch, smooth periostracum when not worn off
Three Kings, North, South, Stewart and Chatham Islands. 0-604 metres, attached to hard substrate ACFME.
Sigapatella terraenovae Peile, 1924 (=crater Finlay, =tumens Finlay)
Width 30mm, Height 20mm, Marine, Endemic
Off Three Kings Islands, Far North and Ranfurly Bank, East Cape. Attached to hard substrate, 27-93 metres ACE.