The domain Eukarya is divided into four kingdoms: Protoctists, Fungi, Plantae and Animalia.
Each kingdom is subdivided into phyla. Each phylum contains organisms with a similar body plan which is very different from those of organisms in different phyla.
The phyla are divided into classes, the classes are divided into orders, the orders are divided into families. At the bottom of the hierarchical division, there is more similarity between organisms. Families are divided into genera which contain many species.
Examples of species classification is shown below.
| Kingdom | Fungi | Plantae | Animalia |
| Phylum | Zygomycota | Angiospermophyta | Chordata |
| Class | Zygomycetes | Dicotyledonae | Mammalia |
| Order | Mucorales | Fabales | Carnivora |
| Family | Mucoraceae | Fabaceae | Felidae |
| Genus | Mucor | Lathyrus | Panthera |
| Species | mucedo | odoratus | tigris |