Astralium rotularium
Species of gastropod
From Wikipedia, the free encyclopedia
Astralium rotularium, common name the rotary star shell or the knob star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.[2][3]
| Astralium rotularium | |
|---|---|
| |
| Shell of Astralium rotularium (specimen in the Natural History Museum, Rotterdam) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Family: | Turbinidae |
| Genus: | Astralium |
| Species: | A. rotularium |
| Binomial name | |
| Astralium rotularium | |
| Synonyms[2] | |
|
Trochus rotularius Lamarck, 1822 | |
Description
The size of the shell varies between 25 mm and 50 mm. The white, subdepressed, imperforate shell has a conoid shape. The spire is subacute. The six whorls are obliquely finely costulate with numerous prominent imbricating laterally compressed plicae at the sutures. The body whorl is carinated with plicate-nodose carina. The base of the shell is convex, squamosely concentrically lirate. The white columella is arcuate, not dentate. The aperture is oblique.[4]
Distribution
This marine species is endemic to Australia and occurs off the Northern Territory, Queensland and Western Australia.
