Artikel yang sama juga merujuk Jan Bergstrm, seorang ahli paleontologi yang mempelajari endapan Kambrium awal di Chengjiang, Cina, yang berkata, Fauna di Chengjiang menunjukkan bahwa filum besar dari hewan masa kini telah ada sejak Kambrium awal dan mereka telah berbeda satu sama lain sebagaimana mereka saat ini.
The same article also quotes Jan Bergstrm, a paleontologist who studied the early Cambrian deposits in Chengjiang, China, as saying, The Chengyiang fauna demonstrates that the large animal phyla of today were present already in the early Cambrian and that they were as distinct from each other as they are today.