Umbonella sismondae
Umbonella sismondae is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1]
Umbonella sismondae | |
---|---|
Original drawing with two views of a shell of Umbonella sismondae | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Vetigastropoda |
Order: | Trochida |
Superfamily: | Trochoidea |
Family: | Trochidae |
Genus: | Umbonella |
Species: | U. sismondae |
Binomial name | |
Umbonella sismondae (Issel, 1869) | |
Synonyms | |
Trochus sismondae Issel, 1869 |
Description
The height of the shell attains 4 mm, its diameter also 4 mm. The small, imperforate, greenish shell has a conoid shape. It contains minute, transverse striae. The apex is obtuse. The 4½ whorls increase slowly in size. They are slightly convex and have a distinct suture. The body whorl takes up half of the total length. Its base is angulated and shows on its lower parts four concentric ribs. The oblique aperture is subcircular.[2]
Distribution
This species occurs in the Red Sea on coral reefs.
References
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.