Species Images
Waipu, Northland. 25mm
orange form - Bay of Islands, on oysters. 22mm
Common on mud and sandy flats in sheltered waters
A group devouring a dead bivalve. Parengarenga Harbour, Far North
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 =

Cominella (Cominista) glandiformis (Reeve, 1847)

Classification:Gastropoda - Caenogastropoda - Neogastropoda
Size/Grows to:Height 24mm, Width 13mm
Distribution:North, South, Stewart and Chatham Islands
Geographical Range:ACFME.
References and Publications:
  • Morley, M.S. Oct/2013: In a Whorl with Cominella glandiformis, Poirieria, 37 (p.4)
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.193)
  • Bimler, A. 1976: Effects of overcrowding on floating behaviour in the mud whelk Cominella glandiformis (Mollusca: Gastropoda), New Zealand Journal of Marine and Freshwater Research, 10(4) (p.715)

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