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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Astropecten polyacanthus ： ウィキペディア英語版 Astropecten polyacanthus ''Astropecten polyacanthus'', the sand sifting starfish or comb star, is a sea star of the family Astropectinidae. It is the most widespread species in the ''Astropecten'' genus, found throughout the Indo-Pacific region. The armspread is up to . The specific epithet "polyacanthus" comes from the Latin meaning "many thorned".〔(Astropecten polyacanthus - Comb seastar ) JulianRocks.net. Retrieved 2012-04-07.〕 ==Description== The upper surface of the comb star is a dark purplish colour, while the underside is orange. On the upper surface paxillae, (Latin, "little stakes") little pillars with flattened summits, are cream, grey or brown, the colours sometimes making a chevron pattern. Along the edges of the five arms there is a fringe of long, sharp marginal spines, usually with brown bases and pale tips. The arms are fairly broad and have a maximum length of .〔 The tube feet are pointed rather than having suckers, an arrangement that is more suitable for digging.〔 ''Astropecten polyacanthus'' can be confused with ''Archaster spp.'' which look similar because both have developed features to enable them to dig through sand through convergent evolution. ''Archaster'' has spines that are flat and blunt and on its upper surface has parallel, radial rows of plates while ''Astropecten polyacanthus'' does not.〔(Telling Apart Sand Stars: ''Archaster'' vs. ''Astropecten''! Two Common Trade Species ) Echinoblog. Retrieved 2012-04-07.〕 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「Astropecten polyacanthus」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.