For many years, Ediacarans were believed to have been confined to the Vendian. Indeed, there was speculation (e.g. Seilacher 1984) that a mass extinction had terminated the Vendian and eliminated the Ediacaran biota. Since about 1990, however, there has been a steadily accumulating body of Cambrian age discoveries, and a belief that a number of Cambrian forms are, in fact, the direct descendants of Ediacarans.
I hate to keep hitting you between the eyes with stuff you should have been able to find in five minutes using a google search, but you keep making the wildest claims and backing those claims up with outdated or misquoted sources. Do yourself a favor and simply do a web search before posting.