Species Images
On mud flats around Auckland. 25mm
The Mud Snail found commonly on high-tidal mud flats
Houhora Harbour, on mud flats, Far North, NZ. Showing the faecal mud ring which houses the egg mass. 25mm
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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.
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 =

Amphibola crenata (Gmelin, 1791)

Classification:Mollusca (Phylum) > Gastropoda (Class) > Heterobranchia (Subclass) > Amphiboloidea (Superfamily) > Amphibolidae (Family) > Amphibola (Genus)
Size/Grows to:Height 26mm, Width 26mm
Distribution:North and South Islands. On high-tidal mud-flats
Geographical Range:[ACF]
Mud Snail, Karahu. Endemic
References and Publications:
  • Hayward, B.W. Sep/2009: Mass mating of the mud snail, Amphibola crenata, Poirieria, 34 (p.23)
  • Golding, R.E., Ponder, W.F., Byrne, M. 2007: Taxonomy and anatomy of Amphiboloidea (Gastropoda: Heterobranchia: Archaeopulmonata), Zootaxa, 1476 (p.7)
  • Walsby, J.R., Morton, J.E. 1982: Chitons, Limpets & Topshells & Pulmonates (Amphineura, Archaeogastropoda & Pulmonata), Marine Molluscs, University of Auckland, Leigh Marine Laboratory, 1 (p.77)
  • Gardner, N.W. May/1980: Amphibola crenata (Gmelin, 1791), Poirieria, 10(5) (p.82)
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.294)

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