The Palaeozoic era is marked by an unprecented boom of invertebrates and a subsequent spread of higher plants, fishes and amphibians. Not only individual plant and animal groups, but also whole ecosystems developed, and still other new habitats were becoming dolonized.
The Palaeozoic era is marked by an unprecented boom of invertebrates and a subsequent spread of higher plants, fishes and amphibians. Not only individual plant and animal groups, but also whole ecosystems developed, and still other new habitats were becoming dolonized. (en)