Infusoria

An illustration of various creature in a water drop
Illustration of a water drop from stagnant water

Infusoria is a word used to describe various freshwater microorganisms, including ciliates, copepods, euglenoids, planktonic crustaceans, protozoa, unicellular algae and small invertebrates. Some authors (e.g., Bütschli) have used the term as a synonym for Ciliophora. In modern, formal classifications, the term is considered obsolete; the microorganisms previously and colloquially referred to as Infusoria are mostly assigned to the kingdom Protista.

In other contexts, the term is used to define various aquatic microorganisms found in decomposing matter.[1]

  1. ^ "Definition of INFUSORIAN". www.merriam-webster.com. Archived from the original on 2023-02-16. Retrieved 2023-02-16.