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Olenelloides : ウィキペディア英語版 | Olenelloides
''Olenelloides'' is an extinct genus of small sized (about long) fossil trilobite arthropod. It lived during the later part of the Botomian stage, which lasted from approximately 524 to 518.5 million years ago. This faunal stage was part of the Cambrian Period. The most conspicuous feature is the hexagonal head shield that carries 6 ray-like spines. ''O. armatus'' is the only known species in this genus. == Etymology == The genus is named after its originally supposed close relationship with ''Olenellus''. The species epithed ''armatus'', a Latin adjective meaning 'armoured', is a reference to the fierce looking spines of the head shield.
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「Olenelloides」の詳細全文を読む
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