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Beckwithia (arthropod) : ウィキペディア英語版 | Beckwithia (arthropod)
''Beckwithia'' is an extinct genus of average to large size ( to ), soft bodied basal chelicerate arthropods that lived during the late Middle and Upper Cambrian on the former paleocontinent Laurentia, in what are now Utah and Wisconsin. It has an inverted egg-shape, with a semi-circular head, 11 abdominal segments and a tail spine. It is a typical member of the group Aglaspidida. == Etymology == ''Beckwithia '' was named after Frank Beckwith, editor and publisher of the Millard County Chronicle of Delta, Utah in the early to middle 1900s, who had a passion for trilobites.〔http://www.fossilmuseum.net/fossils/aglaspida/beckwithia/Beckwithia.htm〕
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「Beckwithia (arthropod)」の詳細全文を読む
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