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''Zacanthoides'' is an extinct Cambrian genus of trilobite. It was a nektobenthic predatory carnivore. Its remains have been found in Canada (British Columbia, especially in the Burgess Shale, and Newfoundland), Greenland, Mexico, and the USA (Alaska, Nevada, Utah, Vermont, and Idaho for which ''Z. idahoensis'' is named). 〔("Zacanthoides" ) Paleobiology Database, accessed March 28, 2011〕 Its major characteristics are a slender exoskeleton with 9 thoracic segments, pleurae with long spines, additional spines on the axial rings, and a pygidium that is considerably smaller than its cephalon.〔Coppold, Murray and Wayne Powell (2006). ''A Geoscience Guide to the Burgess Shale'', p.58. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN 0-9780132-0-4.〕 ==Species== *''Z. idahoensis'' *''Z. kelsayae'' *''Z. holopygus'' (unrecognized) *''Z. gilberti'' (unrecognized) 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「Zacanthoides」の詳細全文を読む スポンサード リンク
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