| Ethalia bellardii | |
|---|---|
 | |
| Drawing of a shell of Ethalia bellardii | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Ethalia |
| Species: | E. bellardii |
| Binomial name | |
| Ethalia bellardii (Issel, 1869) | |
| Synonyms | |
| |
Ethalia bellardii is a species of sea snail with a top-shaped shell, a marine gastropod mollusk in the family Trochidae, the top snails. [1]
The minute, thin shell has a height of only 2 mm. Its shape is orbicular-depressed, oblique, narrowly umbilicate, transversely minutely costulate. It has a pale rose-color, tessellated with purple. The spire is obtuse. The 4½ whorls are rapidly widening, slightly convex, and planulate at the sutures. They are separated by impressed sutures. The body whorl is large and rounded on the base. The aperture is dilated, ovate-trigonal. The peristome is simple and acute. [2]
This species occurs in the Red Sea off Suez.
Umbonium, sometimes known as the "button top shells", is a genus of sea snails, marine gastropod molluscs in the family Trochidae, the top snails.
The gastropod shell is part of the body of a gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group.
Mitromorpha iozona is a species of sea snail, a marine gastropod mollusk in the family Mitromorphidae.
Calliostoma gualterianum, common name Gualtieri's top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Maxwellia angermeyerae is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Ethalia catharinae is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Gaza superba, common name the superb gaza, is a species of deep sea sea snail, a marine gastropod mollusk in the family Gazidae, the top snails.
Gibbula tumida is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia is a genus of sea snails, marine gastropod mollusks in the subfamily Umboniinae of the family Trochidae, the top snails.
Ethalia carneolata is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia guamensis, common name the Guam button top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia minolina is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethaliella pulchella is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Zethalia zelandica, common name the wheel shell, is a species of sea snail, a marine gastropod mollusk, in the family Trochidae, the top snails.
Ethalia nitida is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia omphalotropis is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia polita is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia rufula is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Ethalia sanguinea is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top-snails.
Tomopleura bellardii is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.