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Taxonomy
Family:
ANABATHRIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Truncatelloidea (Superfamily)
> Anabathridae (Family)
> Amphithalamus (Genus)
> semen (Species)
Genus Synonyms:
=Amphitalamus Carpenter, 1864 (misspelling)
=Amphithalamus (Amphithalamus) Carpenter, 1864
=Amphithalamus (Notoscrobs) Powell, 1927
=Amphithalimus Carpenter, 1864 (misspelling)
=Amphithalmus Carpenter, 1864 (misspelling)
=Microfossa Laseron, 1950
=Notoscrobs Powell, 1927
=Notoscrobs (Microfossa) Laseron, 1950
=Obescrobs Iredale, 1955
=Rissoa (Amphithalamus) Carpenter, 1864
Synonymised Names:
=Amphithalamus (Amphithalamus) semen (Odhner, 1924) accepted, alternate representation
=Notoscrobs (Microfossa) semen (Odhner, 1924)
=Rissoa semen Odhner, 1924
Images: Amphithalamus semen (Odhner, 1924)
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Taxonomy
Family:
ANABATHRIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> Littorinimorpha (Order)
> Truncatelloidea (Superfamily)
> Anabathridae (Family)
> Amphithalamus (Genus)
> semen (Species)
Genus Synonyms:
=Amphitalamus Carpenter, 1864 (misspelling)
=Amphithalamus (Amphithalamus) Carpenter, 1864
=Amphithalamus (Notoscrobs) Powell, 1927
=Amphithalimus Carpenter, 1864 (misspelling)
=Amphithalmus Carpenter, 1864 (misspelling)
=Microfossa Laseron, 1950
=Notoscrobs Powell, 1927
=Notoscrobs (Microfossa) Laseron, 1950
=Obescrobs Iredale, 1955
=Rissoa (Amphithalamus) Carpenter, 1864
Synonymised Names:
=Amphithalamus (Amphithalamus) semen (Odhner, 1924) accepted, alternate representation
=Notoscrobs (Microfossa) semen (Odhner, 1924)
=Rissoa semen Odhner, 1924
Details: Amphithalamus semen (Odhner, 1924)
Size/Grows to:
Height 1.5mm, Width 1.7mm
Distribution:
Three Kings Islands, North Island, and eastern South Island as far south as Otago Peninsula, from 0-110m
Type Data:
  • Cape Maria van Diemen, NZ, (holotype)
Notes:
Marine, Native - Endemic, Intertidal, on coralline algae
Distribution Map
 
References and Publications
  • Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.104)
  • Odhner, N.H. 1924 Papers from Dr. Th. Mortensen's Pacific Expedition 1914–1916. XIX. New Zealand Mollusca, Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening i Kjobenhavn, 77 (p.22) Original Description

NZ Geographical Regions
Key to symbols used in Checklist.
Fw =
Freshwater
L =
Land
N =
North Island
S =
South Island
R =
Recent
Sf =
Subfossil
Fo =
Fossil