
Now standing aside from any dispute about the actual age of these fossils, is there any disagreement that these peculiar critters are representative of some of the earliest of species? I'm sure I would remember if I had seen one recently.
I ask because what is evident in these creatures is a far greater diversity of bodyplan compared to those seen today. Indeed just about every living creature alive today is topologically equivalent, being a tube with a single mouth-gut-anus arrangement. But these early fossils display significant deviations from this arrangement.
I would note that the situation is strikingly familiar to enthusiasts of vintage man-made artifacts of all types: I am thinking of the first aeroplanes with different numbers of wings and motor cars with seating arrangements no longer seen - not to mention radios, TVs, vacuum cleaners etc!
This is because the most efficient solution to our requirement always takes time to emerge due to our limited capacities. We tend to learn as we go along. However, given a specific objective (such as speed, passenger capacity etc.) there is generally an optimum solution waiting to be arrived at. This leads to uniformity - a convergence of style - no jet planes with six wings for example.
Now I am contemplating the same thing amongst the fauna of the Burgess shale. Creatures with multiple mouths, tandem guts and so on. Why would an intelligent designer seem to be following the same path as us?