ریززیاگان

thumb|250px| Scanning electron microscope image of a [[soybean cyst nematode and its egg]] Microfauna () are microscopic animals and organisms that exhibit animal-like qualities and have body sizes that are usually <0.1&nbsp;mm. Microfauna are represented in the animal kingdom (e.g. nematodes, small arthropods) and some other heterotrophic, microscopic eukaryotes. A large amount of microfauna are soil microfauna which includes eukaryotic microbes, rotifers, and nematodes. These types of animal-like eukaryotic microbes and true animals are heterotrophic, largely feeding on bacteria. However, so