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Aspidella :Aspidella'' is also a synonym for the mushroom genus ''Amanita. ''Aspidella'' is an Ediacaran disk-shaped fossil. == Morphology ==
''Aspidella'' consists of disk-shaped fossils, with concentric rings and/or centripetal rays. The diameter of circular ''Aspidella'' varies from 1 to 180 mm.〔Peterson. P. 131〕 Most individuals are between 4 and 10 mm, but smaller animals would presumably have decayed before they could fossilize. Other ''Aspidella'' take the form of ellipses, 3-8 cm long and 1-4 cm wide. Most have a central pimple. The rim of all specimens is made up by ridge-edged rays and/or concentric rings.
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「Aspidella」の詳細全文を読む
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