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Salenioida
The Salenioida are an order of sea urchins, containing a single family, the Saleniidae. == Description and characteristics == They are distinguished from other sea urchins by the presence of a large plate on the upper surface, with the anus to one side. They have very large tubercles between the ambulacral plates, and much smaller ones on the ambulacral plates themselves.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Salenioida」の詳細全文を読む
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