What era is know as the age of invertebrates?

The age of invertebrates is primarily known as the Paleozoic Era, particularly during the Cambrian period, which began around 541 million years ago. This era saw a significant explosion of marine life, with invertebrates such as trilobites, mollusks, and echinoderms becoming dominant. The fossil record from this time showcases a diverse array of invertebrate species that played crucial roles in early ecosystems.