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''Chondroplon bilobatum'' is a medusoid Ediacaran fossil. It has sand-filled tubes, although these may not have been sand-filled in life. It has a shield-like shape, with one end different from the other, and bilateral symmetry claims that it possesses glide reflection symmetry are based upon a taphonomic effect deforming some specimens. ''Chondroplon'' was originally described by Mary Wade in 1971 from fossils found in South Australia. It was named after chondrophores — chitinous floats found on some kinds of colonial floating hydroids. In addition to the Ediacara Hills in South Australia ''Chondroplon'' is also found in the White Sea area of Russia. The host rocks in these areas have been dated as 555 million years old. The original interpretation was that ''Chondroplon'' is a chondrophorine cnidarian. It has also been interpreted as a deformed Dickinsonia. The Vendobionta theory has them as ''"fluid–filled quilts"''. As with most of the Ediacaran biota, scientists are yet to reach agreement on a firm classification for this enigmatic fossil. ==See also== List of Ediacaran genera 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「Chondroplon」の詳細全文を読む スポンサード リンク
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