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Ophiocomina nigra
''Ophiocomina nigra'', commonly known as the black brittle star or black serpent star, is a species of marine invertebrate in the order Ophiurida. It occurs in the north-eastern Atlantic Ocean, the North Sea and the Mediterranean Sea.〔
==Description==
''O. nigra'' is a large brittle star with five narrow arms up to 125mm long and a quite distinct central disc which is up to 25mm wide. The general colour is black or varying shades of brown, but pale coloured specimens occasionally occur. The upper surface of the disc is covered with fine granules which obscure the plates which cover the surface. On the underside the granules are restricted to the outer portion and the plates are visible towards the central mouth. This is surrounded by the feeding apparatus known as Aristotle's lantern with five toothed jaws each with oval jaw plates.〔(Black Brittle Star (''Ophiocomina nigra'') ) Marine Species Identification Portal. Retrieved 2011-08-31.〕 There is a comb-like arrangement of spines down either side of the arms giving them a bristly appearance.〔(Black brittlestar: ''Ophiocomina nigra'' ) Marine Life Information Network. Retrieved 2011-08-31.〕 On the upper side, each arm segment is covered by a broad plate with 5 to 7 spines. On the underside there are tube feet but these have no suckers.〔
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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