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The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles a toy spinning top.
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.
Mangelia subsida is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Oenopota murdochiana is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Daphnella leucophlegma is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Daphnella reticulosa is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Neodrillia albicoma is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Boreotrophon alaskanus is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Boreotrophon clathratus, common name the clathrate trophon, is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Timbellus crauroptera is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Urosalpinx haneti is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Boreotrophon is a genus of sea snails, marine gastropod mollusks in the subfamily Pagodulinae of the family Muricidae, the murex snails or rock snails.
Trophonopsis is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.
Callogaza watsoni is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.
Conus gratacapii is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Cantharidoscops frigidus, the polar margarite, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Alcyna australis is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Halystina umberlee is a species of very small deep-water sea snail, a marine gastropod mollusc in the family Seguenziidae.
Sediliopsis chowanensis is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.
Kanamarua adonis is a species of sea snail, a marine gastropod mollusk in the family Colubrariidae.
References
- 1 2 Boreotrophon apolyonis (Dall, 1919) . Retrieved through: World Register of Marine Species on 24 April 2010.
- ↑ "Proceedings of the United States National Museum". Biodiversity Heritage Library. ISSN 0096-3801 . Retrieved 22 January 2022.
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