| Fossarina picta | |
|---|---|
 | |
| Original drawing of a shell of Fossarina picta | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Fossarina |
| Species: | F. picta |
| Binomial name | |
| Fossarina picta A. Adams, 1864 | |
Fossarina picta is a species of very small sea snail, a marine gastropod mollusc or micromollusk in the family Trochidae, known as the top snails. [1]
The shell grows to a length of 4 mm. The shell is depressed and turbinate, bearing a strong resemblance to Fossarina patula , though its spiral lirae are uniform and straightforward. The shell comprises four convex whorls, with a particularly sizable body whorl sporting a rounded margin. The lips are sharp and arcuate, while the aperture takes on a near-circular shape. The overall shell outline leans toward being more orbicular. Irregular purple-black radiating blotches are present on the shell, and the umbilical region typically displays a pale yellow hue. [1]
This marine species occurs off the coat of South Korea and Japan.
Calliostoma is a genus of small to medium-sized sea snails with gills and an operculum, marine gastropod molluscs within the family Calliostomatidae, the Calliostoma top snails. Previously this genus was placed within the family Trochidae. Calliostoma is the type genus of the family Calliostomatidae.
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.
Fossarina is a genus of sea snails, marine gastropod molluscs in the family Trochidae, the top shells.
Fossarina rimata is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails.
Entemnotrochus rumphii, common name the Rumphius' slit shell, is a species of large sea snail with gills and an operculum, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.
Conus martensi is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Boreotrophon alaskanus is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Usilla tosana is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Clanculus ater, common name the topsnail, 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.
Conus gratacapii is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Bolma henica, common name the deep sea star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Enida japonica 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.
Sukashitrochus carinatus is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Scissurellidae, the little slit snails.
Fossarina patula is a species of very small sea snail, a marine gastropod mollusc or micromollusk in the family Trochidae, the top snails.
Fossarina petterdi is a species of very small sea snail, a marine gastropod mollusc or micromollusk in the family Trochidae, the top snails.
Fossarina reedi, common name Reed top shell, is a species of very small sea snail, a marine gastropod mollusc or micromollusk 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.
Kermia tokyoensis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.