1) Burgess Shale fossil 
[genus] For the commune in France, see Chancia. Chancia is an extinct genus of Cambrian trilobite. It was a `fast-moving epifaunal detritivore` from Canada (British Columbia, specifically Burgess Shale, and Newfoundland) and the USA (Idaho, Pennsylvania, Utah, and Vermont). Chancia was a particle feeder. Its major characteristics are a norm...