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.
Kermadec Islands
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
Cookian - Lower North Island and the northern part of the South Island
Forsterian - Otago, Fiordland and Stewart Island
Moriorian - Chatham Islands, Pitt Island
Antipodean - Subantarctic Islands of New Zealand
FW =
L =
E =
I =

Tristichotrochus tosaensis Kuroda & Habe, 1961

Classification:Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Subclass) > Trochida (Order) > Trochoidea (Superfamily) > Calliostomatidae (Family) > Tristichotrochus (Genus)
Size/Grows to:Width 21mm, Height 23mm
Distribution:Southern Japan, Philippine Islands, Chesterfield Islands, Loyalty Ridge, Kermadec Islands. 100-501 metres
Geographical Range:[K.]
References and Publications:
  • Marshall, B.A. 2016: New species of Venustatrochus Powell, 1951 from New Zealand, and new species of Falsimargarita Powell, 1951 and a new genus of the Calliostomatidae from the southwest Pacific, with comments on some other calliostomatid genera (Mollusca: Gastropoda), Molluscan Research, 36(2) (p.139)
  • Marshall, B.A. 1995: Calliostomatidae (Gastropoda: Trochoidea) from New Caledonia, the Loyalty Islands, and the northern Lord Howe Rise. Resultats des Campagnes Musorstom volume 14, Mémoires du Muséum National d'Histoire Naturelle, 167 (p.411)
  • Marshall, B.A. 1979: The Trochidae and Turbinidae of the Kermadec Ridge (Mollusca: Gastropoda), New Zealand Journal of Zoology, 6(4) (p.538)

Note: Localities are approximate, and represent only some of the known localities for the species.