specimens of Thectardis are known, from two bedding surfaces, separated by 2 km and 10 million years at Mistaken Point, Newfoundland. Thectardis bearing bedding...

clade. Several other extinct or obscure life forms, such as Iotuba and Thectardis, appear to have emerged in the group. Characteristics of eumetazoans include...

fossils in the assemblage. Other forms do exist, such as the conical Thectardis. Some of the forms here appear to survive until the extinction of the...

Narbonne, G.M.; Gehling, J.G.; Greentree, C.; Anderson, M.M. (2004). "Thectardis avalonensis: A New Ediacaran Fossil from the Mistaken Point Biota, Newfoundland"...

grade animals, and apply their method to a putative Ediacaran sponge Thectardis avalonensis. A study on the impact of oxygenation pulses during the Cambrian...