Aperture (disambiguation) — An aperture is an opening, in particular one whose size determines what can or cannot pass through. The term can in particular refer to:*Aperture of an optical system, the opening that limits the amount of light that can pass through *Aperture… … Wikipedia
Mollusc shell — Closed and open shells of a marine bivalve, Petricola pholadiformis. A bivalve shell is composed of two hinged valves which are joined by a ligament … Wikipedia
Whorl (mollusc) — A whorl is a single, complete 360° turn in the spiral growth of a mollusc shell. A mollusc shell is basically a long tube, usually coiled in a spiral for strength and compactness. The number of whorls in the shell depend on various factors in the … Wikipedia
Sculpture (mollusc) — Sculpture on a mollusc shell is whatever natural 3 dimensional ornamentation exists on the outer surface of a shell, apart from the basic shape of the shell itself. The term sculpture is most often applied to the shells of gastropods and bivalves … Wikipedia
Turbo (mollusc) — Taxobox name = Turbinidae image caption = Turbo marmoratus regnum = Animalia phylum = Mollusca classis = Gastropoda subclassis = Prosobranchia ordo = Archaeogastropoda superfamilia = Trochacea familia = Turbinidae genus = Turbo genus authority =… … Wikipedia
Apex (mollusc) — The apex is a word most often used to mean the tip of the spire of the shell of a gastropod. It is the first formed, and therefore the oldest, part of the shell. To be more precise, the apex would usually be where the tip of the embryonic shell… … Wikipedia
Freshwater pearl mussel — The exterior of the shell of Margaritifera margaritifera Conservation status … Wikipedia
Ranella olearius — Taxobox name = Ranella olearius image caption = status = LR/nt status system = IUCN2.3 regnum = Animalia phylum = Mollusca classis = Gastropoda ordo = Sorbeoconcha infraordo = Neogastropoda familia = Ranellidae genus = Ranella species = R.… … Wikipedia
Eye — For other uses, see Eye (disambiguation), Ocular (disambiguation), Ocular, and Oculus. For taxon specific articles, see human eye, simple eye in invertebrates, mollusc eye, and arthropod eye. Eye … Wikipedia
Body whorl — The body whorl in a mollusc shell is the most recently formed whorl of a spiral shell, terminating in the aperture. The size of the body whorl differs greatly according to shell morphology. In shells in which the rate of whorl expansion after… … Wikipedia