| Umbonium costatum | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Umbonium |
| Species: | U. costatum |
| Binomial name | |
| Umbonium costatum (Kiener, 1839) | |
| Synonyms | |
| |
Umbonium costatum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. [1] [2]
The size of the shell varies between 12 mm and 25 mm. The heavy, solid shell has a depressed shape. Its spire is low-conoidal, the periphery rounded. The color pattern is whitish or light yellow, closely tessellated all over with blackish-olive or reddish-brown squarish spots. The tessellated color-markings sometimes form subcontinuous oblique bands. The surface is shining and polished, with strong spiral grooves above, generally 4 to 6 on the body whorl. The sutures are narrowly impressed, with a rather wide margin below them, which often shows a slight tendency to be tuberculate. The base of the shell is smooth, tessellated around the irregularly convex, flesh-colored central callus. The shell contains six whorls, the last a little concave above, convex beneath. The subquadrate aperture is pearly inside. The circular callus is heaviest in front of the aperture and behind the columellar lip. [3]
This species occurs in the Sea of Japan and in the East China Sea.
In Japan, the snail is called kisago, and its shell was once used as pieces for ohajiki , a children's game similar to marbles. [4]
Phasianella solida, common name the solid pheasant, is a species of sea snail, a marine gastropod mollusk in the family Phasianellidae.
Tegula hotessieriana is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.
Euchelus atratus, common name the blackish margarite, is a species of sea snail, a marine gastropod mollusk in the family Chilodontaidae.
Umbonium giganteum 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.
Chrysostoma paradoxum, common name the orange-mouthed top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Camitia rotellina, common name the wheel top shell, 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.
Isanda coronata is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Tibatrochus incertus is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae.
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.
Ethaliella capillata is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Lirularia redimita is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Trochidae, the top snails.
Lirularia yamadana is a species of small 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 suturale is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Kermia tokyoensis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Tristichotrochus consors is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
