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The shell of the sea snail Epitonium scalare has a sculpture of sharp vertical ribs known as "costae" The shell of the freshwater snail Bulinus forskalii has strong transverse ribs which form an angle at the shoulder. Sculpture is a feature of many of the shells of mollusks.
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 .
A snail is a mollusc of the class gastopoda. Snails are extraordinarily diverse but all have coiled shells as adults to protect them and a strong foot coated in mucous for locomotion. All land snails are hermaphrodites and have two sets of tentacles which carry the eyes and olfactory organs. Articles this image appears in Snail Creator Al2
The family of Volutidae comprises a suite of large shells remarkable for their great beauty and elegance of form. The shell of species such as Melo amphora can grow as large as 50 cm (19.7 inches) in length. [2] Volutes are distinguished by their distinctively marked spiral shells (to which the family name refers, voluta meaning "scroll" in Latin).
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Shell of marine snail Lunella torquata with the calcareous operculum in place Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place. An operculum (Latin for 'cover, covering'; pl. opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also ...
Naticidae, common name moon snails or necklace shells, is a family of medium to large-sized predatory sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of the species in this family are mostly globular in shape. Naticidae is the only family in the superfamily Naticoidea.
Eunicidae jaws are known from as far back as Ordovician sediments. [4] [5] Cultural tradition surrounds Palola worm (Palola viridis) reproductive cycles in the South Pacific Islands. [6] Eunicidae are economically valuable as bait in both recreational and commercial fishing. [7] [8] Commercial bait-farming of Eunicidae can have adverse ...