''Velumbrella'' is a medusoid organism with tentacles known from the Middle Cambrian of Poland, and perhaps related to ''

Rotadiscus ''Rotadiscus'' is a genus of discoidal animal known from the Cambrian Chengjiang biota The Maotianshan Shales are a series of Early Cambrian deposits in the Chiungchussu Formation, famous for their '' Konservat Lagerstätten'', deposits known ...

''; the fossils depict a scleritosed disk with a U-shaped gut. It was originally related to members of the

Ediacara biota The Ediacaran (; formerly Vendian) biota is a taxonomic period classification that consists of all life forms that were present on Earth during the Ediacaran Period (). These were composed of enigmatic tubular and frond-shaped, mostly sessil ...

but is now thought to be related to the paropsonemids.

References

Cambrian invertebrates Prehistoric animal genera Fossils of Poland {{cambrian-animal-stub