🦠microbiology review

Nanoarchaeota

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Nanoarchaeota is a phylum of Archaea known for containing extremely small and symbiotic microorganisms. They are often found living in association with other archaea, relying on their host for many metabolic functions.

5 Must Know Facts For Your Next Test

  1. Nanoarchaeota was first discovered in a hydrothermal vent environment.
  2. Members of Nanoarchaeota have some of the smallest genomes among archaea, indicating a high level of dependency on their host organisms.
  3. They are obligate symbionts, meaning they cannot live independently without their host archaea.
  4. Nanoarchaeum equitans is the most well-studied species within this phylum.
  5. Their discovery has provided significant insights into the evolution and diversity of archaeal life forms.

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