Burgess Shale.

'Classifying ...  Burgess Shale animals as “primitive members of many animal groups” is a contrivance based on evolutionary assumptions, not on scientific observations. No-one has observed any of the Burgess Shale fauna evolve into anything else. They appear in the fossil record as fully formed distinct creatures, and sadly most creatures in this fossilised “wonderful life” (as Stephen Jay Gould described them) have died out and we only know of them because they were rapidly and deeply buried. The Burgess Shale fauna, including these newly described creatures, remind us that the real history of animal life of earth is one of decreasing variety and extinction, fossilised only via rapid burial.' John Mackay.