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Taxonomy
Family: Subfamily:
TROCHIDAE: MONODONTINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Vetigastropoda (Subclass)
> Trochida (Order)
> Trochoidea (Superfamily)
> Trochidae (Family)
> Monodontinae (Subfamily)
> Diloma (Genus)
> nigerrimum (Species)
Genus Synonyms:
=Anisodiloma Finlay, 1926
=Cavodiloma Finlay, 1926
=Fractarmilla Finlay, 1926
=Melagraphia Gray, 1847
=Monodonta (Neodiloma) P. Fischer, 1885
=Neodiloma P. Fischer, 1885
=Trochus (Diloma) Philippi, 1845
=Zediloma Finlay, 1926
=Zediloma (Fractarmilla) Finlay, 1926
Synonymised Names:
=Monodonta crusoeana Pilsbry, 1889
=Monodonta nigerrima (Gmelin, 1791)
=Turbo nigerrimus Gmelin, 1791
=Zediloma digna Finlay, 1926
Images: Diloma nigerrimum (Gmelin, 1791)
On kelp at mid-high tide, Kaikoura, Canterbury, NZ. 25mm
On kelp at mid-high tide, Kaikoura, Canterbury, NZ. 25mm
On kelp at mid-high tide, Kaikoura, Canterbury, NZ. 25mm
Holotype of Zediloma digna Finlay, collected St. Clair, Dunedin, Otago, NZ (MA70870). © Auckland Museum (CC-BY)
Holotype of Zediloma digna Finlay, collected St. Clair, Dunedin, Otago, NZ (MA70870). © Auckland Museum (CC-BY)
Taxonomy
Family: Subfamily:
TROCHIDAE: MONODONTINAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Vetigastropoda (Subclass)
> Trochida (Order)
> Trochoidea (Superfamily)
> Trochidae (Family)
> Monodontinae (Subfamily)
> Diloma (Genus)
> nigerrimum (Species)
Genus Synonyms:
=Anisodiloma Finlay, 1926
=Cavodiloma Finlay, 1926
=Fractarmilla Finlay, 1926
=Melagraphia Gray, 1847
=Monodonta (Neodiloma) P. Fischer, 1885
=Neodiloma P. Fischer, 1885
=Trochus (Diloma) Philippi, 1845
=Zediloma Finlay, 1926
=Zediloma (Fractarmilla) Finlay, 1926
Synonymised Names:
=Monodonta crusoeana Pilsbry, 1889
=Monodonta nigerrima (Gmelin, 1791)
=Turbo nigerrimus Gmelin, 1791
=Zediloma digna Finlay, 1926
Details: Diloma nigerrimum (Gmelin, 1791)
Size/Grows to:
Height 30mm, Width 26mm
Distribution:
North, South, Stewart, Chatham, Three Kings and Auckland Islands. On kelp at mid/high tide
Geographical Range:
ACFMAn
Notes:
Marine
Distribution Map
 
References and Publications
  • 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 (p.482)
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.53)

*98 © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)

Key to Geographical Ranges
NZ Map showing 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 approximation of the range of each species within New Zealand.
K=
Kermadec Islands
A=
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
C=
Cookian - Lower North Island and the northern part of the South Island
F=
Forsterian - Otago, Fiordland and Stewart Island
M=
Moriorian - Chatham Islands, Pitt Island
An=
Antipodean - Subantarctic Islands of New Zealand
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
R =
Recent
Sf =
Subfossil
Fo =
Fossil
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