Alcyna australis | |
---|---|
Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Vetigastropoda |
Order: | Trochida |
Superfamily: | Trochoidea |
Family: | Trochidae |
Genus: | Alcyna |
Species: | A. australis
|
Binomial name | |
Alcyna australis Hedley, 1907
|
Alcyna australis is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. [1]
The size of the shell varies between 1.8 mm and 2.5 mm. The small shell has a broadly conical shape. The 4½ whorls are rounded and increase rapidly in size.
Colour: adult whorls dull white, protoconch dark purple.
Sculpture: the base is ornamented with spaced spiral grooves. These occur, but fainter, on the penultimate whorl. The protoconch, embracing 2½ whorls, is more strongly spirally furrowed. The large aperture is round. Into it projects from the columella a prominent tooth-like tubercle. The contrast in colour and sculpture between the apical and succeeding whorls distinguishes this species. [2]
This marine species is endemic to Australia and occurs off Queensland, Western Australia, Tasmania and in the Timor Sea.
Alcyna australis | |
---|---|
Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Vetigastropoda |
Order: | Trochida |
Superfamily: | Trochoidea |
Family: | Trochidae |
Genus: | Alcyna |
Species: | A. australis
|
Binomial name | |
Alcyna australis Hedley, 1907
|
Alcyna australis is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. [1]
The size of the shell varies between 1.8 mm and 2.5 mm. The small shell has a broadly conical shape. The 4½ whorls are rounded and increase rapidly in size.
Colour: adult whorls dull white, protoconch dark purple.
Sculpture: the base is ornamented with spaced spiral grooves. These occur, but fainter, on the penultimate whorl. The protoconch, embracing 2½ whorls, is more strongly spirally furrowed. The large aperture is round. Into it projects from the columella a prominent tooth-like tubercle. The contrast in colour and sculpture between the apical and succeeding whorls distinguishes this species. [2]
This marine species is endemic to Australia and occurs off Queensland, Western Australia, Tasmania and in the Timor Sea.