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Hermit crabs inhabiting marine gastropod shells that lived in the Persian Gulf. A group of beachworn sea snail shells that vary in size, form and pattern combination. A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea.
Wentletrap shells have a roundish or oval aperture, but its inner lip is often reduced to strip of callus. The round and horny operculum is paucispiral and fits the aperture tightly. Most of the species in the family are small to minute, although some are larger, and overall the adult shell length in the family varies between 0.6 and 11.7 cm. [ 4 ]
Diodora cayenensis, the Cayenne keyhole limpet, is a species of small to medium-sized sea snail or limpet, a western Atlantic marine prosobranch gastropod mollusk in the family Fissurellidae, the keyhole limpets. [2] This species is named after Cayenne, the capital of French Guiana. The spelling using one "n" is original and is therefore retained.
Shells of various species of cowrie; all but one have their anterior ends pointing towards the top of this image. Cowrie or cowry (pl. cowries) is the common name for a group of small to large sea snails in the family Cypraeidae. The term porcelain derives from the old Italian term for the cowrie shell (porcellana) due to their similar appearance.
The museum's exhibits include shells from all over the world. However, many shells on show in the museum are from Florida, and a substantial number are from Sanibel and Captiva islands. This is because Sanibel Island is one of the best seashell collecting spots in the world (comparable to Jeffreys Bay in Africa and the Sulu Archipelago in the ...
William James Clench. Robert Tucker Abbott (September 28, 1919 – November 3, 1995) [1] was an American conchologist (seashells) and malacologist (molluscs). He was the author of more than 30 books on malacology, which have been translated into many languages. Abbott was one of the most prominent conchologists of the 20th century.
Biomineralization. The mollusc (or mollusk[spelling 1]) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes. Not all shelled molluscs live in the sea; many live on the land and in freshwater.
The periostracum, as well as the coloration, is only rarely preserved in fossil shells. The apertural end of the gastropod shell is the anterior end, nearest to the head of the animal; the apex of the spire is often the posterior end or at least is the dorsal side. Most authors figure the shells with the apex of the spire uppermost.