[eastsider]

The article acknowledged that “The Cambrian Explosion is widely regarded as one of the most relevant episodes in the history of life on Earth, when the vast majority of animal phyla first appear in the fossil record.”

I thought that that all phyla appeared during the Cambrian Explosion, that no new phyla have appeared since, and that some phyla have since become extinct.

[GodGunsGuts]

It would be more appropriate to say that nearly all animal phyla were recorded in the fossil record during what has come to be called the Cambrian Explosion.