We like to think of this as a Humans world, but by sheer biomass and biodiversity, it’s an insect world. I’ll give you fungi though.
It’s a nematode world. Four of every five animals on earth are nematodes. As USDA researcher Nathan Cobb wrote in 1915, “If all the matter in the universe except the nematodes were swept away, our world would still be dimly recognizable, its mountains, hills, vales, rivers, lakes, and oceans represented by a film of nematodes.” Fungi love nematodes and keep them in check by eating them.