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Species List for Genus: Diloma
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Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Subclass) > Trochida (Order) > Trochoidea (Superfamily) > Trochidae (Family) > Monodontinae (Subfamily) > Diloma (Genus)
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  • Genus: Diloma

  • Diloma aethiops (Gmelin, 1791)
    Width 38mm, Height 35mm
    Marine, Native - Endemic
    North, South, Stewart and Chatham Islands
    ACFM
  • Diloma aridum (Finlay, 1926)
    Height 19mm, Width 17mm
    Marine, Native - Endemic, Purplish-black with pale yellow flecks
    Throughout New Zealand. Chatham and Auckland Islands. On sheltered mid-tidal rocks
    ACFMAn
  • Diloma bicanaliculatum (Dunker, 1845)
    Width 18mm, Height 17mm
    Marine, Native - Endemic
    North, South and Stewart Island. Under stones at low tide
    ACF
  • Diloma coracinum (Philippi, 1851)
    Width 12mm, Height 12mm
    Marine, Native - Endemic
    North and upper South Island
    ACF
  • Diloma durvillaea Spencer, Marshall & Waters, 2009
    Width 13mm, Height 12mm
    Marine, Native - Endemic
    South Island. From Lyttelton Harbour south, under holdfasts & on blades of Durvillaea antarctica & adjacent rocks near low tide level
    CFAn
  • Diloma nigerrimum (Gmelin, 1791)
    Height 30mm, Width 26mm
    Marine
    North, South, Stewart, Chatham, Three Kings and Auckland Islands. On kelp at mid/high tide
    ACFMAn
  • Diloma subrostratum (Gray, 1835)
    Width 30mm, Height 30mm
    Mudflat Top Shell, Marine, Native - Endemic
    North, South and Stewart Island
    ACF
  • Diloma zelandicum (Quoy & Gaimard, 1834)
    Width 32mm, Height 24mm
    Marine, Native - Endemic
    North, South and Stewart Island
    ACF
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