The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators...

external shell big enough that the soft parts can withdraw completely into it. Slugs are gastropods that have no shell or a very small, internal shell; semislugs...

of the shell field; dpp controls the shape of the shell, and Hox1 and Hox4 have been implicated in the onset of mineralization. In gastropod embryos...

of some animals Mollusc shell Bivalve shell Gastropod shell Shell, of a brachiopod Turtle shell Armadillo shell Electron shell or a principal energy level...

wood. Shell Beach, Western Australia, is a beach which is entirely made up of the shells of the cockle Fragum erugatum. Certain species of gastropod seashells...

opening in gastropod shells, scaphopod shells, and also for Nautilus and ammonite shells. The word is not used to describe bivalve shells, where a natural...

form: apical) is part of the shell of a mollusk. The apex is the pointed tip (the oldest part) of the shell of a gastropod, scaphopod, or cephalopod. The...

aperture of the shell when the soft parts of the animal are retracted. The shape of the operculum varies greatly from one family of gastropods to another....

part of the shell of a snail, a gastropod mollusc, a gastropod shell, and also the whorls of the shell in ammonites, which are fossil shelled cephalopods...

feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half...

tissue. The mantle of many gastropods is usually fully or partially hidden inside the gastropod shell. The marine gastropod Cypraea chinensis, the Chinese...

A snail is a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name snail...

surrounds an opening to an organ or structure. Some plants, fungi, and shelled gastropods have peristomes. In mosses, the peristome is a specialized structure...

freshwater pearl mussel shells are made of nacre. Other mollusc families that have a nacreous inner shell layer include marine gastropods such as the Haliotidae...

slugs are gastropods, i.e. they are sea snails (marine gastropod mollusks) that, over evolutionary time, have either entirely lost their shells or have...

snail shells such as Aratan snail and rice snail. Gastropod shells used by Coenobita variabilis As the hermit crabs grow, they must exchange their shell for...

hydrothermal-vent gastropods, and it is the only known extant animal that incorporates iron sulfide into its skeleton (into both its sclerites and into its shell as...

of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod...

growth. Organisms with open shells can grow by adding new material to the aperture of their shell, as is the case in gastropods, bivalves, and other molluscans...

a gastropod synapomorphy which occurs in all gastropods during larval development. Torsion is the rotation of the visceral mass, mantle, and shell 180˚...

information, see Gastropod shell. Each complete rotation of this spirally-arranged tube is called a whorl. The whorls of a snail shell usually overlap...

the lower the note. Various species of large marine gastropod shells can be turned into blowing shells, but some of the best-known species used are the sacred...

this superfamily have small, flimsy, almost globular shells, known as paper bubble gastropod shells. This superfamily is not monophyletic. Species in this...

Sea snails are slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda...

hermit crabs using gastropod shells stretches back to the Late Cretaceous. Before that time, at least some hermit crabs used ammonite shells instead, as shown...

the shell of many shelled animals, including molluscs and brachiopods. Among molluscs, it is primarily seen in snails and clams, i.e. in gastropods and...

Conchology Hardy's Internet Guide to Marine Gastropods : Shell Catalog book on crafting with Abalone Shell Archived 9 March 2021 at the Wayback Machine...

Ecphora gardnerae is a species of extinct predatory ocenebrinid murex gastropod. Shells of E. gardnerae are found in Miocene-aged marine strata of Maryland...

shell trumpets have been played in many Pacific Island countries, as well as South America and Southern Asia. The shells of large marine gastropods are...

found growing on a gastropod shell inhabited by the hermit crab, Pagurus prideaux. The anemone often completely envelops the shell and because of this...