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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.
The gastropods, commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda.
Heterobranchia, the heterobranchs, is a taxonomic clade of snails and slugs, which includes marine, aquatic and terrestrial gastropod mollusks.
The operculum, meaning little lid, is a corneous or calcareous anatomical structure like a trapdoor which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails; the structure is found in some marine and freshwater gastropods, and in a minority of terrestrial gastropods, including the families Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc.
Captain Frederick Wollaston Hutton was an English-New Zealand scientist who applied the theory of natural selection to explain the origins and nature of the natural history of New Zealand. An army officer in early life, he then had an academic career in geology and biology. He became one of the most able and prolific nineteenth century naturalists of New Zealand.
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.
Tonna cumingi, common name Cuming's tun, is a species of very large sea snail, a tun snail, a marine gastropod mollusc in the family Tonnidae, the tuns.
Tonna is a genus of large sea snails, marine gastropod molluscs in the family Tonnidae, the tun or cask shells.
Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung. Most feed on algae, but many are detritivores and some are filter feeders.
Unedogemmula deshayesii is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.
Terebra deshayesii is a species of sea snail, a marine gastropod mollusc in the family Terebridae, the auger snails.
Loxotaphrus is a genus of sea snails, marine gastropod mollusks in the family Cancellariidae, the nutmeg snails.
Unedogemmula is a genus of sea snails, marine gastropod mollusks in the family Turridae, the turrids.
Peristernia is a genus of sea snails, marine gastropod mollusks in the family Fasciolariidae, the spindle snails, the tulip snails and their allies. March
Vexillum (Costellaria) deshayesi is a species of small sea snail, marine gastropod mollusk in the family Costellariidae, the ribbed miters.
Tonna deshayesii is a species of large sea snail, a marine gastropod mollusk in the family Tonnidae, the tun shells.
Guraleus is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae.
Acanthocardia is a genus of saltwater clams, marine bivalve molluscs in the family Cardiidae. Like most other bivalves, these mollusks are suspension feeders. This genus is present from the Upper Oligocene to the Recent.
Terrestrial molluscs or land molluscs (mollusks) are an ecological group that includes all molluscs that live on land in contrast to freshwater and marine molluscs.
Guraleus deshayesii is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
References
- 1 2 Loxotaphrus deshayesii (Duval, 1841) . Retrieved through: World Register of Marine Species on 6 April 2010.
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