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}} ''Olenoides'' was a trilobite from the Cambrian period. Its fossils are found well-preserved in the Burgess Shale in Canada. It grew up to 10 cm long. ''Olenoides'' followed the basic structure of all trilobites — a cephalon (head shield), a thorax with seven jointed parts, and finally a semicircular pygidium. Its antennae were long, and curved back along its sides. Its thin legs show that it was no swimmer, instead crawling along the sea floor in search of prey. This is also evidenced by fossil tracks that have been found. Conspicuous W-shaped wounds, often partially healed, on ''Olenoides'' specimens may be due to predation by Anomalocaris.〔Coppold, Murray and Wayne Powell (2006). ''A Geoscience Guide to the Burgess Shale'', p.60. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN 0-9780132-0-4.〕 Its major characteristics are a large parallel-sided glabella, deep interpleural furrows on the pygidium, and slender pygidial spines, as well as the fact that it is the most common limb-bearing trilobite species in the Burgess Shale. Specimens have been found in the Marjumian of the USA (Utah and New York). General Cambrian fossils have been found in Canada (British Columbia and Newfoundland), Greenland, Kazakhstan, Russia, and the USA (Idaho, Nevada for which ''O. nevadensis'' is named, New York, Pennsylvania for which O. pennsylvanicus is named, Virginia, Utah, and Wyoming).〔Paleobiology Database. ("Chancia", accessed March 27, 2011 )〕 The Burgess Shale's preservative qualities have helped ''Olenoides'' become one of the best known of trilobites. ==Synonyms== ''Olenoides'' was formerly known as ''Neolenus''. ''Kootenia'' is sometimes considered a junior synonym because the main morphological difference between the two genera was ''Kootenias lack of ''Olenoides strong interpleural furrows on the pygidium, which is now believed to be variable.〔Coppold, Murray and Wayne Powell (2006). ''A Geoscience Guide to the Burgess Shale'', p.59. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN 0-9780132-0-4.〕 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「Olenoides」の詳細全文を読む スポンサード リンク
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