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The terms are derived from the Latin words for "left" (sinister) and "right" (dexter). Other disciplines use different terms (such as dextro-and laevo-rotary in chemistry, or clockwise and anticlockwise in physics) or simply use left and right (as in anatomy). Relative direction and chirality are distinct concepts.
The opposite is sinistral (Latin: sinister, left). This is consistent with the terms for right-handed screws in engineering and physics. Most species of sea snail are dextral. Within a typically dextral species, rare individuals may develop sinistral coiling. In religious usage, the shankha (sacred conch shell) is displayed spire downwards.
Janthina janthina is a species of holoplanktonic sea snail, a marine gastropod mollusk in the family Epitoniidae. Its common names include violet sea-snail, common violet snail, large violet snail and purple storm snail. [2] Exhibit of Janthina janthina at Manchester Museum
A species of sea snail in its natural habitat: two individuals of the wentletrap Epidendrium billeeanum with a mass of egg capsules in situ on their food source, a red cup coral. A sea snail Euthria cornea laying eggs. Sea snails are slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone.
Sinistrofulgur perversum, the lightning whelk, is a species of very large predatory sea snail or whelk, a marine gastropod mollusc in the family Busyconidae, the busycon whelks. This species has a left-handed or sinistral shell. It eats mostly bivalves.
Syrinx aruanus, common name the Australian trumpet or false trumpet, is a species of extremely large sea snail measuring up to 75 cm long and weighing up to 18 kg. It is a marine gastropod mollusk in the family Turbinellidae, and is the only species in the genus Syrinx.
'Memoir of a Snail' Short version: When she's separated from beloved twin brother, a girl with a passion for collecting ornamental snails becomes friends with an eccentric elderly woman who shares ...
Conus ventricosus mediterraneus is a subspecies of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies. [1] Like all species within the genus Conus, these snails are predatory and venomous. They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all.