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Pentremites
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Pentremites : ウィキペディア英語版
Pentremites

''Pentremites'' is an extinct genus of blastoid echinoderm belonging to the family Pentremitidae.〔
==Description==
These echinoderms averaged a height of about but occasionally ranged up to about 3 times that size. They were related to the crinoids or ''sea lilies'', living on the sea floor attached by a stalk. They trapped food floating in the currents by means of tentacle-like appendages.〔(Museum of Victoria )〕
''Pentremites'' species lived in the early to middle Carboniferous, from 360.7 to 314.6 Ma. Its fossils are known from North America.〔

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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