| Umbonium giganteum | |
|---|---|
 | |
| Two shells of Umbonium giganteum | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Clade: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Umbonium |
| Species: | U. giganteum |
| Binomial name | |
| Umbonium giganteum (Lesson, 1831) | |
| Synonyms | |
| |
Umbonium giganteum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. [1]
The height of the shell attains 16 mm, its diameter 27 mm. The large, solid shell has a depressed shape. It is slate-colored or reddish above, with a series of black spots below the suture, sometimes alternating with white ones. The periphery is usually encircled with a row of white blotches. The base is largely white, with a dark streak encircling the callus. The low spire is conoidal and contains seven plane whorls. The body whorl is often somewhat concave above, rounded at the circumference, and slightly convex beneath. The shining surface is smooth, with a few (usually 4) narrow spiral impressed lines just above the periphery, which are obsolete in the adult. The convex base has a white callus or partly brown or ashen. In the middle there is a prominent, blunt, heavy tubercle. The oblique aperture is subquadrate.
This is largest species of Umbonium. The nearly smooth surface has a blotched periphery and a central tubercle on the callus pad distinguish it. [2]
This marine species occurs in the Western Pacific and off Japan.
Lentigo lentiginosus, common name the silver conch, is a species of medium-sized sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs.
Mitromorpha fischeri is a species of sea snail, a marine gastropod mollusk in the family Mitromorphidae.
Homalopoma sanguineum is a species of sea snail, a marine gastropod mollusk in the family Colloniidae.
Guildfordia triumphans, common name the triumphant star turban, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Tegula hotessieriana is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
Tegula viridula is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
Microgaza fulgens is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.
Oxystele impervia is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Trochus tubiferus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Umbonium moniliferum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Tegula cooksoni is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
Cantharidus rufozona is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Coelotrochus carmesinus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Umbonium costatum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Callistele calliston, common name the beautiful top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae.
Tegula quadricostata is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
Clanculus robertsi is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Umbonium callosum is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Umbonium conicum is a species of very small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Umbonium sagittatum is a species of very small sea snail, a marine gastropod mollusc or micromollusc in the family Trochidae, the top snails.