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Cyclomedusa delicata Fedonkin, 1981

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This is a good Ediacara fossil of the species Cyclomedusa delicatafrom the Vendian of the White Sea. Ediacara fossills of the genus Cyclomedusa are widely distributed. As the name suggest was Cyclomedusa interpreted in the past as a jellyfish. This specimen shows why this interpretation is today mostly considered as outdated. Specimens of Cyclomedusa that are close together interfere with each others grow as it is nicely shown at the double on this plate. What is a indication a benthic (on the ground) or even sessile (attached to the ground) live habit. Also the structures of Cyclomedusa are not comparebile with modern jellyfish anatomy. So today it is suggested that Cyclomedusa was some kind of microbial colony. Like on nearly all Ediacara biota fossils is this interpretation not undisputed. The Fossil itself mesures about 17 mm.

	Location:	Solza River, Arkhangelsk region, Russia
	Fossil Size :	about 31 x 29 mm
	Age:	Precambrian, Ediacarum, Yampol Member, Mogilev Formation, Balday Series (Ca. 570 Mill. Years)

Product no.: 9376