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''Aacocrinus'', also known as the feather star, is a genus of extinct sea lily from the Actinocrinitidae (or Patelliocrinidae) family.〔Crinoids from the Anchor Limestone (Lower Mississippian) of the Monte Cristo Group, southern Nevada.〕〔New Carboniferous crinoids from eastern Australia.〕〔The actinocrinitid genera Abactinocrinus, Aacocrinus and Blairocrinus.〕〔J. J. Sepkoski. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560 ( Alroy/J. Alroy/M. Carrano )〕〔New genera of Mississippian camerate crinoids. Paleontological Contributions University of Kansas Echinodermata, art. 1 1955: 1-23. (Record Volume 92 )〕〔Camerata.〕 It has been shown that it was an attached stationary organism that blindly fed on passing organism. It was composed of Mg calcite and its habitat included the upper-level epifauna.〔Kiessling 2004〕〔Aberhan et al. 2004〕〔fhttp://www.paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=31679&is_real_user=1〕 There are currently 14 species within this genus: * ''Aacocrinus acylus'' (Webster & Jell 1999) * ''Aacocrinus algeriaensis'' (Webster, Maples, Sevastopulo, Frest & Waters 2004)〔Carboniferous (Visean-Moscovian) echinoderms from the Bechar Basin area of western Algeria. Bulletins of American Paleontology, 368, December 30, 2004: 1-98. (Record Volume 142 )〕 * ''Aacocrinus boonensis'' * ''Aacocrinus chouteauensis'' * ''Aacocrinus enigmaticus'' (Webster & Lane 1987) * ''Aacocrinus milleri'' * ''Aacocrinus nododorsatus'' (Bowsher 1955) * ''Aacocrinus protuberoarmatus'' (Missouri) * ''Aacocrinus sampsoni'' * ''Aacocrinus senectus'' * ''Aacocrinus spinosulus'' * ''Aacocrinus spinulosus'' * ''Aacocrinus tetradactylus'' (Missouri) * ''Aacocrinus triarmatus'' ==References== 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「Aacocrinus」の詳細全文を読む スポンサード リンク
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