The Late Hothouse 

The hothouse world has by now been transformed from what it was at the start. Sogland, the dominant biome 15 million years ago, has been replaced by a range of new habitats, many arising directly as a result of animal evolution. The late hothouse is now a world of distinct and diverse environments including forests, savannahs, deep and shallow seas, highlands, towering sand dunes, and many types of islands - each and every one supporting its own varied array of new and endemic plant and animal species.