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 =

Heliacus (Gyriscus) asteleformis (Powell, 1965)

Classification:Gastropoda - Caenogastropoda - Heterobranchia
Size/Grows to:Height 8mm, Width 7.5mm
Distribution:Kermadec Islands, Wanganella Bank. Between Cape Maria van Diemen and Three Kings Islands
Geographical Range:K.A
References and Publications:
  • Brook, F.J., Marshall, B.A. 1998: The coastal molluscan fauna of the northern Kermadec Islands, southwest Pacific Ocean, Journal of the Royal Society of New Zealand, 28 (p.229)
  • Bieler, R. 1993: Architectonicidae of the Indo-Pacific (Mollusca, Gastropoda), Abhandlungen des Naturwissenschaftlichen Vereins in Hamburg (NF), 30 (p.273)
  • Bieler, R. 1988: Phylogenetic relationships in the gastropod family Architectonicidae, with notes on the family Mathildidae (Allogastropoda), Malacological Review (p.209)
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.247)
  • Powell, A.W.B. 1965: New Zealand Molluscan Systematics with Descriptions of New Species: Part 5, Records of the Auckland Institute and Museum, 6(2) (p.161)

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