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The shells are small to rather large (diameter of base without attachments 19–160 mm; height of shell 21–100 mm), depressed to conical, with narrow to wide, simple to spinose peripheral edge or flange separating spire from base.
Most species of wentletrap are white, and have a porcelain-like appearance. They are notable for their intricately geometric shell architecture, and the shells of the larger species are prized by collectors. The more or less turret-shaped shell consists of tightly-wound (sometimes loosely coiled), convex whorls, which create a high, conical spiral.
Conch (US: / k ɒ ŋ k / konk, UK: / k ɒ n tʃ / kontch [1]), or conque, also known as a "seashell horn" or "shell trumpet", is a wind instrument that is made from a conch, the shell of several different kinds of sea snails. Their natural conical bore is used to produce a musical tone. Conch shell trumpets have been played in many Pacific ...
The Registry of World Record Size Shells is a conchological work listing the largest (and in some cases smallest) verified shell specimens of various marine molluscan taxa.A successor to the earlier World Size Records of Robert J. L. Wagner and R. Tucker Abbott, it has been published on a semi-regular basis since 1997, changing ownership and publisher a number of times.
The shell of this mollusc species has special significance to shell collectors because it was once regarded as the rarest shell in the world. For about two centuries between its initial discovery and the discovery of its habitat in 1969, specimens were valued in the thousands of U.S. dollars and generally only owned by museums and wealthy private collectors.
The shell of Cassis cornuta is a very popular collector's item. In some places the snail is hunted for meat and is traditionally roasted in the shell over fire. Because of both of these factors, humans are a major enemy, and the species is now at risk in many places. However, worldwide it is not listed in the Red List.
Anomiids have extremely thin, translucent, paper-like shells.There is often a hole in the lower shell, caused by growth of the shell around the byssus.The shell follows the shape of the object it lies on - usually a rock or a large shell of another creature.
Cassis tuberosa, the king helmet, is a species of very large sea snail with a solid, heavy shell, a marine gastropod mollusc in the family Cassidae, the helmet shells and their allies. [ 1 ] Distribution