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wentletrap
Wentletraps are small, often white, very high-spired, predatory or ectoparasitic sea snails, marine gastropod mollusks in the family Epitoniidae.〔Gofas, S. (2010). Epitoniidae. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=132 on 24 April 2011〕
The word ''wentletrap'' originated in Dutch (''wenteltrap''), and it means spiral staircase. These snails are sometimes also called "staircase shells", and "ladder shells".
The Epitoniidae family belongs to the superfamily Epitonioidea, which also includes the Janthinidae (the pelagic purple snails) and the family Nystiellidae, all part of the informal group Ptenoglossa. Epitoniidae is a rather large family, with an estimated number of species about 630.
==Distribution==
Wentletraps inhabit all seas and oceans worldwide, from the tropical zones to the Arctic and Antarctic zones.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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