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Meoma ventricosa : ウィキペディア英語版 | Meoma ventricosa
''Meoma ventricosa'', known by the common names cake urchin and red heart urchin, is a large species of sea urchin which lives in shallow waters in the Caribbean. It may reach a diameter of twenty centimeters and is covered in reddish-brown spines. It has both pentagonal radial symmetry and bilateral symmetry, giving it a sand-dollar appearance; however, two of its five sections are merged more closely than the others. ==Subspecies== There are two subspecies:〔 *''Meoma ventricosa grandis'' Gray, 1851 *''Meoma ventricosa ventricosa'' (Lamarck, 1816)
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