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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
E =
Endemic
I =
Introduced
Gastropoda - Vetigastropoda - Trochidae: Cantharidinae
Trochidae: Cantharidinae
 
Genus: Cantharidus (Calliotropis)map >
Cantharidus (Calliotropis) capillaceus (Philippi, 1848) (=coruscans Hedley)
Height 28mm, Width 20mm
Auckland, Campbell and Antipodes Islands [An]
Cantharidus (Calliotropis) dilatatus (G.B.Sowerby II, 1870)
Height 8mm, Width 8mm, Endemic
North, South, Stewart and Chatham Islands. On kelp at low tide to about 5 metres [ACFM]
Height 6.2mm, Endemic
Off Three Kings Islands and off Cape Reinga, Far North, 13-88 metres [A]
Cantharidus (Calliotropis) opalus (Martyn, 1784) (=cannoni Powell, 1933)
Height 50mm, Width 38mm, Opal Top Shell. Endemic
North, South, Stewart and Chatham Islands. Littoral to moderate depths [ACFM]
Genus: Cantharidus (Pseudomargarella)map >
Cantharidus (Pseudomargarella) antipoda (Hombron & Jacquinot, 1854) (=roseus Hutton, =hinemoa Powell)
Width 12mm, Height 10mm, Endemic
South Island, Otago to Stewart Island, Snares, Campbell, Auckland and Antipodes Islands. Under kelp holdfasts [FAn]
Width 8mm, Height 8mm, Endemic
Chatham Islands, intertidal to shallow water [M]
Width 11mm, Height 11mm, Endemic
Macquarie Island [An]
Height 5.0mm, Width 5.5mm, Endemic. Distinct flattened base
South Island [CF]
Width 9mm, Height 8mm, Endemic
Stewart Island. On seaweed covered rocks [F]
Genus: Micrelenchus (Micrelenchus)map >
Micrelenchus (Micrelenchus) huttonii (E.A.Smith, 1876) (=tenebrosus Adams)
Height 11.5mm, Endemic
Bay of Islands south, and Stewart Island. 0-7 metres, Inhabits sheltered waters, especially Zostera, sea-grass, on tidal flats and sheltered rock pools [ACF]
Micrelenchus (Micrelenchus) sanguineus (Gray in Dieffenbach, 1843) (=cryptus Powell)
Height 8mm, Width 7mm, Endemic
North, South and Stewart Island [ACF]
Micrelenchus (Micrelenchus) tenebrosus A.Adams, 1853 (=parcipictus Powell)
Height 11mm, Width 10mm, Endemic. Coastal, open water on seaweed and under kelp holdfasts
Southern North Island, South and Stewart Island. Under stones in coastal regions [ACF]
Height 9mm, Width 8mm, Endemic
North, South, Stewart and Chatham Islands [ACF]
Genus: Micrelenchus (Mawhero)map >
Height 26mm, Width 16mm, Endemic
Off Three Kings Islands, 5-33 metres on algae. Middlesex Bank and King Bank, 7-805 metres [A]
Height 35mm, Width 21mm, Endemic
North and South Island. On seaweed at low tide to about 120 metres [AC]
Genus: Roseaplagismap >
Roseaplagis artizona A.Adams, 1853 (=elongatus Suter, =micans Suter, =bakeri Fleming)
Width 6mm, Height 8mm, Endemic
Southern North Island to Stewart Island [CF]
Roseaplagis caelata Hutton, 1884
Height 6.0mm, Width 5.0mm, Endemic
Otago to Stewart Island, Snares Islands [F]
Roseaplagis mortenseni (Odhner, 1924) (=morioria Powell, =archibenthicola Dell)
Width 6mm, Height 7mm, Endemic
South Island. From Otago south to Stewart Island. Chatham, Auckland, Campbell, Antipodes and Bounty Islands. In beach drift. Living at 10-244 metres [CFMAn]
Roseaplagis rufozona A.Adams, 1853
Height 8mm, Width 7mm, Endemic
North Island to Cook Strait. In shell sand [AC]