Diloma bicanaliculata bicanaliculata

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Diloma bicanaliculata bicanaliculata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Prosobranchia
Order: Archaeogastropoda
Superfamily: Trochacea
Family: Trochidae
Genus: Diloma
Species: D. bicanaliculata
Subspecies: D. bicanaliculata bicanaliculata
Trinomial name
Diloma bicanaliculata bicanaliculata
(Dunker, 1844)

Diloma bicanaliculata bicanaliculata, or the knobbed top shell, is a subspecies of small sea snail, a marine gastropod mollusk, in the family Trochidae, the top snails.

[edit] Distribution

This species is endemic to the North Island of New Zealand.

[edit] Shell description

The shell is rather small, depressed conic, very solid, dull black but with dark olive interspaces between the heavy nodose cords. The columella and aperture are heavily callused and silvery.

The maximum shell height is 17 mm, and the maximum width 19 mm.

[edit] References