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Linné on line arrow Plants and Animals arrow The order in nature arrow The hierarchy among organisms

The hierarchy among organisms

To understand the system within each realm one needs to know the hierarchy within the realm. Each level in the hierarchy has a scientific name. Above genus level some names have a specific suffix. The hierarchy of the wood anemone is as follows:

 
Level: Example: Suffix:
Realm Plantae
Division Anthophyta -phyta
Class Dicotyledones
Order Ranunculales -ales
Family Ranunculaceae -aceae
Genus Anemone
Species Anemone nemorosa

The hierarchy and naming looks a bit different for the housefly since it is an animal:

Level: Example: Suffix:
Realm Animalia
Phylum Arthropoda
Class Insecta
Order Diptera
Family Muscidae -idae
Genus Musca
Species Musca domestica

A species can be further divided into smaller groups. An abbreviation of the type of subgroup and an additional name is then added after the species name:

Level: Abbreviation:
Subspecies ssp.
Variety var.
Form f.

In the Swedish alpine area there is a subspecies of common sorrel named Rumex acetosa ssp. lapponicus. For animals the abbreviation is usually not provided. The narrow billed subspecies of Eurasian nutcracker is just written: Nucifraga caryocatactes macrorhynchus.