Short version
The “fossils” are based on specimens from the Burgess Shale, a rock unit deposited 505 million years ago in what is now British Columbia. These eight species — Vauxia, Olenoides, Opabinia, Pikaia, Aysheaia, Hallucigenia, Marrella, and Anomalocaris — illustrate different modes of life in the Burgess. Vauxia was a sponge. Aysheaia was a parasite that lived on Vauxia. Hallucigenia lived on the muddy bottom and was a scavenger. Marrella, also a bottom dweller, was another scavenger. Anomalocaris, the largest animal from the Burgess, was a predator. Olenoides was a hunter scavenger that crawled on the sea floor bottom. Opabinia was a swimmer. Pikaia was probably a filter feeder.
Burguess Shell
The “fossils” are based on specimens from the Burgess Shale, a rock unit deposited 505 million years ago in what is now British Columbia. These eight species — Vauxia, Olenoides, Opabinia, Pikaia, Aysheaia, Hallucigenia, Marrella, and Anomalocaris — illustrate different modes of life in the Burgess. Vauxia was a sponge. Aysheaia was a parasite that lived on Vauxia. Hallucigenia lived on the muddy bottom and was a scavenger. Marrella, also a bottom dweller, was another scavenger. Anomalocaris, the largest animal from the Burgess, was a predator. Olenoides was a hunter scavenger that crawled on the sea floor bottom. Opabinia was a swimmer. Pikaia was probably a filter feeder.
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