Diloma bicanaliculatum

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Diloma bicanaliculatum
Scientific classification edit
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea
Family: Trochidae
Genus: Diloma
Species: D. bicanaliculatum
Binomial name
Diloma bicanaliculatum
(Dunker, 1844) [1]
  • Diloma (Fractarmilla) lenior Finlay, H.J., 1927
  • Trochus bicanaliculatus Dunker in Philippi, 1844 (original combination)

Diloma bicanaliculatum, common name the knobbed top shell, is a species of small sea snail, a marine gastropod mollusk, in the family Trochidae, the top snails.[2]


The size of the shell varies between 10 mm and 20 mm.


This marine shell is endemic to New Zealand and occurs off North Island, South Island and Stewart Island.


  1. ^ Dunker in Philippi, Conchyl Cab., p. 202, t. 30, f. 6.
  2. ^ Bouchet, P. (2013). Diloma bicanaliculatum(Dunker in Philippi, 1844). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546857 on 2014-03-18
  • Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
  • Willan, R.C.; Marshall, B.A.; Climo, F.M.; Cernohorsky, W.O. 1980: Rectification of nomenclature for Melagraphia aethiops (Gmelin) and Diloma bicanaliculata (Dunker) (Mollusca: Trochidae). New Zealand Journal of Marine and Freshwater Research 14: 413-415
  • Donald K.M., Kennedy M. & Spencer H.G. (2005) The phylogeny and taxonomy of austral monodontine topshells (Mollusca: Gastropoda: Trochidae), inferred from DNA sequences. Molecular Phylogenetics and Evolution 37: 474-483