The end of the Cambrian saw a series of mass extinctions during which many shell-dwelling brachiopods and other animals went extinct. The trilobites also suffered heavy losses.

This challenges the notion of abrupt events like the Cambrian Explosion and emphasizes ... area of research focuses on the Late Ordovician mass extinction (LOME), which is characterized by two ...

The archaic sponge reef-dwellers of the Cambrian gave way to bryozoans ... This resulted in the second largest mass extinction of all time, wiping out at least half of all marine animal species ...