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Periechocrinus : ウィキペディア英語版 | Periechocrinus
''Periechocrinus'' is an extinct genus of crinoids belonging to the order Monobathrida, family Periechecrinidae. 〔(Encyclopedia of Life )〕〔 W.H.C. Ramsbottom (Periechocrinus versus Periechocrinites ) - Annals and Magazine of Natural History: Series 12 Volume 7, Issue 81, 1954〕 These stationary upper-level epifaunal suspension feeders lived during the Carboniferous period and the Mississippian age of Australia, as well as in the Silurian of Canada, Czech Republic, United Kingdom and United States, from 436.0 to 345.3 Ma. 〔 ==Species==
*''Periechocrinus costatus'' (Austin and Austin) *''Periechocrinus indicator'' Etheridge Jr. 1892 〔
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