Species Images
From the Three Kings Islands. 93mm. Photographed from an old collection, pre 1970's
A large herbivorous Land Snail from Three Kings Islands, NZ
From Three Kings Islands, NZ
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 =
N =
North Island
S =
South Island
E =
I =

Placostylus (Basileostylus) bollonsi Suter, 1908

Classification:Mollusca (Phylum) > Gastropoda (Class) > Heterobranchia (Subclass) > Stylommatophora (Order) > Orthalicoidea (Superfamily) > Bulimulidae (Family) > Placostylinae (Subfamily) > Placostylus (Genus) > Basileostylus (Subgenus)
Size/Grows to:Height 100mm, Width 39mm
Distribution:Three Kings Islands
Flax Snail Pupuharakeke. Land, Endemic
References and Publications:
  • Buckley, T.R., Stringer, I., Gleeson, D., Howitt, R., Attanayake, D., Parrish, R., Sherley, G., Rohan, M. 2011: A revision of the New Zealand Placostylus land snails using mitochondrial DNA and shell morphometric analyses, with implications for conservation., New Zealand Journal of Zoology, 38(1) (p.55)
  • Brook, F.J. 2003: Conservation status of the giant endemic landsnail Placostylus bollonsi on Three Kings Islands, DOC Science Internal Series, 140 (p.5)
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.349)
  • Climo, F.M. 1973: The Systematics, Biology and Zoogeography of the land snail fauna of Great Island, Three Kings Group, New Zealand, Journal of the Royal Society of New Zealand, 3(4) (p.583)
  • Powell, A.W.B. 1948: Land Mollusca of the Three Kings Islands, Records of the Auckland Institute and Museum, 3 (p.288)

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