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Taxonomy
Family:
POROMYIDAE
Full Classification:
Mollusca (Phylum)
> Bivalvia (Class)
> Autobranchia (Subclass)
> Heteroconchia (Infraclass)
> Euhetrodonta (Subterclass)
> Anomalodesmata (Superorder)
> Poromyoidea (Superfamily)
> Poromyidae (Family)
> Dilemma (Genus)
> inexpectatum (Species)
Synonymised Names:
=Corculum inexpectatum Crozier, 1966
Images: Dilemma inexpectatum (Crozier, 1966)
Holotype, collected 15 Jul 1962, NW of Three Kings Islands, NZ (M.018488). 8mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Holotype, collected 15 Jul 1962, NW of Three Kings Islands, NZ (M.018488). 8mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Holotype, collected 15 Jul 1962, NW of Three Kings Islands, NZ (M.018488). 8mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Holotype, collected 15 Jul 1962, NW of Three Kings Islands, NZ (M.018488). 8mm. © Museum of New Zealand Te Papa Tongarewa (CC-BY-NC-ND)
Taxonomy
Family:
POROMYIDAE
Full Classification:
Mollusca (Phylum)
> Bivalvia (Class)
> Autobranchia (Subclass)
> Heteroconchia (Infraclass)
> Euhetrodonta (Subterclass)
> Anomalodesmata (Superorder)
> Poromyoidea (Superfamily)
> Poromyidae (Family)
> Dilemma (Genus)
> inexpectatum (Species)
Synonymised Names:
=Corculum inexpectatum Crozier, 1966
Details: Dilemma inexpectatum (Crozier, 1966)
Size/Grows to:
Length 8mm, Width 2.7mm
Distribution:
North of Three Kings Islands, trawled 800 metres
Geographical Range:
A
Notes:
Marine, Native - Endemic
Distribution Map
 
References and Publications
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.413)
  • Crozier, M. 1966 New species and records of Mollusca from off the Three Kings Islands, New Zealand., Transactions of the Royal Society of New Zealand, 8 (p.42) Original Description

*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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