Diloma nigerrima

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Diloma nigerrima
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Prosobranchia
Order: Archaeogastropoda
Superfamily: Trochacea
Family: Trochidae
Genus: Diloma
Species: D. nigerrima
Binomial name
Diloma nigerrima
(Gmelin, 1791)

Diloma nigerrima, or the bluish top shell, is a species of small sea snail, a marine gastropod mollusk, in the family Trochidae, the top snails.

[edit] Distribution

This species is endemic to New Zealand.

[edit] Shell description

The shell is depressed-globose, solid, dark bluish-slate to almost black, smooth, except for weak spiral striations. The parietal wall has a nacreous area uniting the ends of the simple sharp peristome. The interior of the aperture is iridescent.

The maximum shell height is 26 mm, and the maximum width is 24 mm.

[edit] References