Retallack, G.J. & Broz, A.P. 2020
Arumberia and other Ediacaran–Cambrian Fossils of Central Australia.
Historical Biology (in press - ahead-of-print publication) 25 pp. PDF LINK
Until recently classified as a jellyfish, Medusina mawsoni is now considered to be the trace where a holdfast where a rangeomorph such as Rangea was connected to the substrate as in Charniodiscus being the base of Charnia. This specimen is thus about 555 million years old and is from the Rawnsley Quartzite.