Wiki: Outline of life forms

The following outline is provided as an overview of and topical guide to life forms:

A life form (also spelled life-form or lifeform) is an that is Life, such as plants (flora), animals (fauna), and fungi (funga). It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species,

(1996). 9780412633805, Springer. . ISBN 9780412633805

are Extinction.

(2025). 9780300084696, Yale University Press. . ISBN 9780300084696

Earth is the only celestial body known to harbor life forms. No form of extraterrestrial life has yet been discovered.

Archaea

Archaea – a domain of single-celled microorganisms, morphologically similar to bacteria, but they possess genes and several metabolic pathways that are more closely related to those of eukaryotes, notably the enzymes involved in transcription and translation. Many archaea are extremophiles, which means living in harsh environments, such as hot springs and salt lakes, but they have since been found in a broad range of habitats.

Thermoproteota – a phylum of the Archaea kingdom. Initially

Thermoprotei

Sulfolobales – grow in terrestrial volcanic hot springs with optimum growth occurring

Euryarchaeota – In the taxonomy of microorganisms

Haloarchaea

Halobacteriales – in taxonomy, the Halobacteriales are an order of the Halobacteria, found in water saturated or nearly saturated with salt.

Methanobacteria

Methanobacteriales – information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues.

Methanococci

Methanococcales aka Methanocaldococcus jannaschii – thermophilic methanogenic archaea, meaning that it thrives at high temperatures and produces methane

Methanomicrobia

Methanosarcinales – In taxonomy, the Methanosarcinales are an order of the Methanomicrobia

Methanopyri

Methanopyrales – In taxonomy, the Methanopyrales are an order of the methanopyri.

Thermococci

Thermococcales

Thermoplasmata

Thermoplasmatales – An order of aerobic, thermophilic archaea, in the kingdom

Halophiles – organisms that thrive in high salt concentrations
Korarchaeota

Korarchaeum cryptofilum – These archaea have only been found in high temperature hydrothermal environments, particularly hot springs

Lokiarchaeota
Methanogens
Nanoarchaeota

Nanoarchaeum equitans – This organism was discovered in 2002 and lives inside another archaea.

Psychrophiles – (sigh-crow-files)
Nitrososphaerota – a phylum of the Archaea proposed in 2008 after the genome of Cenarchaeum symbiosum
thermophilic – (a thermophile is an organism)