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Taxonomy
Family:
EPITONIIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> [unassigned] Caenogastropoda (Order)
> Epitonioidea (Superfamily)
> Epitoniidae (Family)
> Janthina (Genus)
> umbilicata (Species)
Synonymised Names:
=Ianthina (Iodina) megastoma A. Adams, 1861
=Janthina globosa Blainville, 1822
=Janthina nitida A. Adams, 1861
Images: Janthina umbilicata d'Orbigny, 1840
From Tom Bowling Bay, Far North, NZ. 16mm. © rights reserved
From Tom Bowling Bay, Far North, NZ. 16mm. © rights reserved
From Tom Bowling Bay, Far North, NZ. 16mm. © rights reserved
From Tom Bowling Bay, Far North, NZ. Close-up of sculpture. 16mm. © rights reserved
Washed up on ocean beach, Far North, NZ. 15mm. © rights reserved
Taxonomy
Family:
EPITONIIDAE
Full Classification:
Mollusca (Phylum)
> Gastropoda (Class)
> Caenogastropoda (Subclass)
> [unassigned] Caenogastropoda (Order)
> Epitonioidea (Superfamily)
> Epitoniidae (Family)
> Janthina (Genus)
> umbilicata (Species)
Synonymised Names:
=Ianthina (Iodina) megastoma A. Adams, 1861
=Janthina globosa Blainville, 1822
=Janthina nitida A. Adams, 1861
Details: Janthina umbilicata d'Orbigny, 1840
Size/Grows to:
Height 20mm, Width 17mm
Distribution:
Tropical and temperate seas. Kermadec Island and northern North Island as far south as Motuhora Island
Notes:
Marine, Pelagic, feeds mainly on colonial cnidarians (Physalia, Velella, Porpita)
Description:
Fine and closely spaced growth ridges

Distribution Map
 
References and Publications
  • Beu, A.G. 2017 Evolution of Janthina and Recluzia (Mollusca: Gastropoda: Epitoniidae), Records of the Australian Museum, 63(3) (p.196)
  • Oliver, W.R.B. 1915 The Mollusca of the Kermadec Islands, Transactions and Proceedings of the New Zealand Institute, 47 (p.525)

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
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