A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name snail is also used for most of the members of the molluscan class Gastropoda that have a coiled shell that is large enough for the animal to retract completely into. When the word "snail" is used in this most general sense, it includes not just land snails but also numerous species of sea snails and freshwater snails. Gastropods that naturally lack a shell, or have only an internal shell, are mostly called slugs, and land snails that have only a very small shell are often called semi-slugs.
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell.
Dupontia levis is a species of small air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Euconulidae, the hive snails. This species is endemic to Mauritius.
Dupontia is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Euconulidae, the hive snails.
Dupontia nitella is a species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Euconulidae, the hive snails. This species is found in Mauritius and Réunion.
Dupontia poweri is a species of small air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Euconulidae, the hive snails. This species is endemic to Mauritius.
Dupontia proletaria is an extinct species of small air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Euconulidae, the hive snails.
Dupontia is a genus of Arctic and Subarctic plants in the grass family.
Graphephorum is a genus of North American plants in the grass family.
Astyris is a genus of sea snails, marine gastropod mollusks in the family Columbellidae, the dove snails.
Bullia is a genus of sea snails, marine gastropod mollusks in the family Nassariidae, the Nassa mud snails or dog whelks.
Serrata perlucida is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
Serrata is a genus of sea snails, marine gastropod mollusks in the family Marginellidae, the margin snails.
Rheinheimera perlucida is a Gram-negative, rod-shaped and motile bacterium from the genus of Rheinheimera which has been isolated from water from the Baltic Sea.
Homorus is agenus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Achatinidae.
