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Species List for Genus: Diloma
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)
    (=lugubris Gmelin)
    Width 30mm, Height 28mm, Marine, Endemic
    North, South, Stewart and Chatham Islands ACFME.
  • Diloma aridum (Finlay, 1927)
    Width 17mm, Height 19mm, Marine, Endemic, Purplish-black with pale yellow flecks
    Throughout New Zealand. Chatham and Auckland Islands. On sheltered mid-tidal rocks ACFMAnE.
  • Diloma bicanaliculatum (Dunker in Philippi, 1844)
    (=lenior Finlay)
    Width 18mm, Height 17mm, Marine, Endemic
    North, South and Stewart Island. Under stones at low tide ACFE.
  • Diloma coracinum (Philippi, 1851)
    (=excavata Adams & Angas)
    Width 12mm, Height 12mm, Marine, Endemic
    North and upper South Island ACFE.
  • Diloma durvillaea Spencer, Marshall & Waters, 2009
    Width 13mm, Height 12mm, Marine, Endemic, Green area bordering columellar wall
    South Island. From Lyttelton Harbour south, under holdfasts & on blades of Durvillaea antarctica & adjacent rocks near low tide level CFAnE.
  • Diloma nigerrimum (Gmelin, 1791)
    (=digna Finlay, =crusoeana Pilsbry)
    Height 26mm, Width 24mm, Marine
    North, South, Stewart, Chatham, Three Kings and Auckland Islands. On kelp at mid/high tide ACFMAn
  • Diloma subrostratum (Gray in Yate, 1835)
    (=corrosa A.Adams, =novaezelandiae Anton, =plumbea Hutton)
    Width 25mm, Height 25mm, Mudflat Top Shell, Marine, Endemic
    North, South and Stewart Island ACFE.
  • Diloma zelandicum (Quoy & Gaimard, 1834)
    Width 25mm, Height 20mm, Marine, Endemic
    North, South and Stewart Island ACFE.
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
E =
Endemic
I =
Introduced
R =
Recent
Sf =
Subfossil
Fo =
Fossil