Kuibis Quartzite, Kuibis Supergroup, Nama Fauna, Ediacaran: Globular Fossils
During the last years, some presumed fossil stuff from the Kuibis quartzite from the ediacaran Nama fauna of South Africa became available (via several different fossil dealers). It looks always the same and is termed as "medusoid",
"Skinnera" or "possibly Albumarid", mostly with question marks which point to the uncertain ID of these specimens.
They seem to be quite common since they are not very rare on the market and not very expensive, compared to ediacaran fossils that are assigned to met
This is a rather late reply to your query – three years’ late, in fact, but I’m hoping it may still be of some use to you.
The Nama Group fossil you asked about is Namacalathus hermanastes.
(Grotzinger, J.P., Watters, W.A., and Knoll, A.H. 2000. Calcified metazoans in thrombolite-stromatolite reefs of the terminal Proterozoic Nama Group, Namibia, Paleobiology, 26(3), pp. 334–359).
N. hermanastes. was connected to the substrate by a stalk, and was therefore not a medusoid. The chalice-shaped