Archaea Master List

Domain Archaea contains the following...

Acidophiles: This group includes organisms capable of thriving in hyperacidic conditions, most of which have an optimal growth pH of 5 or lower (OGpH<5)

Hyperacidotolerant, near-acidophilic neutriphiles: This group includes organisms that have an OGpH slightly above this (e.g., Nanoarchaeum equitans, OGpH=6) but can nonetheless be found flourishing in hyperacidic environments (pH=0.5-1.5).

Domain: Archaea

Kingdom: Proteoarchaeota

Superphylum: TACK group

Phylum: Thaumarchaeota

Phylum: Crenarchaeota

Kingdom: Archaea Incertae sedis → DPANN group

Superphylum: DPANN group (9x; 3*, 9†, 3*†)

Phylum: Candidatus Diapherotrites (1x; 1†)

Phylum: Aenigmarchaeota (1x; 1†)

Phylum: Nanoarchaeota (3x; 3*, 3†, 3*†)

Phylum: DPANN Incertae sedis → Mancarchaeum (1x; 1†)

Phylum: Candidatus Micrarchaeota (1x; 1†)

Phylum: Candidatus Parvarchaeota (2x; 2†)

Kingdom: Archaea Incertae sedis → euryarchaeota

Superphylum: Archaea Incertae sedis → euryarchaeota

Phylum: Euryarchaeota (>383x; >193*, 6**, 19†, 12††, 176‡, 1***, 1†††, 1*†‡, 3†‡, 9††‡)

“Hypergeophilic genera” and “hypergeotolerant genera” refer here to genera known to include hypergeophilic species and/or species with hypergeotolerances.

Genera containing thermophilic and hyperthermotolerant organisms are marked with an asterisk (*)

Genera containing barophilic and hyperbarotolerant organisms are marked with two asterisks (**)

Genera containing acidophilic and hyperacidotolerant organisms are marked with a dagger (†)

Genera containing alkaliphilic and hyperalkalitolerant organisms are marked with two daggers (††)

Genera containing thermoacidophilic and hyperthermoacidotolerant organisms are marked with an asterisk and a dagger (*†)

Genera containing halophilic and hyperhalotolerant organisms are marked with a double dagger (‡)

Bacteria marked with an asterisk and a degree sign (*°) are endospore-forming polyextremotolerant organisms. Bacterial endospores tend to give the bacteria capable of producing them polyextremotolerance. Endospores are known for being able to survive extremely high doses of radiation, vacuum dessication, extreme heat and cold, lack of nutrients, and in some cases even the passage of hundreds of millions of years (for example, Virgibacillus marismortui (formerly Bacillus marismortui and Bacillus strain 2-9-3) was revived by scientists from 250-million-year-old spores (Vreeland, 2000); for comparison, the first dinosaurs began appearing about 220 MYA — 30 million years later). Although these endospore-forming bacteria can survive a variety of harsh conditions, endospore-formation is not done for reproduction, as with fungal spore formation, but is instead a last-ditch effort to survive conditions the bacterium would not otherwise be able to, which means these critters aren’t true polyextremophiles, because they don’t (necessarily) actually grow better in extreme conditions, and in their endospore form don’t even grow at all.

In addition to other sources cited, much of this information was compiled with the help of NCBI’s Taxonomy Browser.

Domain: Archaea

Kingdom: Proteoarchaeota

Superphylum: TACK group

Phylum: Thaumarchaeota

Class: Nitrososphaeria

Order: Nitrosopumilales

Family: Nitrosopumilaceae

Genus: Candidatus Nitrosoarchaeum (3x; 3^-acido)

Genus: Nitrosopumilus (8x; 8^-acido)

Order: Nitrososphaerales

Family: Nitrososphaeraceae

Genus: Candidatus Nitrosocosmicus (1x; 1^-acido)

Genus: Candidatus Nitrososphaera (3x; 3^-acido)

Class: Incertae sedis

Order: Incertae sedis

Family: Incertae sedis

Genus: Candidatus Nitrosopelagicus (1x; 1^-acido)

Class: Incertae sedis

Order: Incertae sedis

Family: Incertae sedis

Genus: Candidatus Nitrosotalea (4x; 4^-acido)

Class: Incertae sedis

Order: Incertae sedis

Family: Incertae sedis

Genus: Candidatus Nitrosotenuis (3x; 3^-acido;)

Phylum: Crenarchaeota

Class: Thermoprotei

Order: Desulfurococcales

Family: Desulfurococcacae

Genus: Aeropyrum (2x; 2^-thermo)

Family: Pyrodictiacae

Genus: Geogemma (1x; 1^-thermo)

Genus: Pyrolobus (1x; 1^-thermo)

Order: Sulfolobales

Family: Sulfobaceae

Genus: Acidianus (10x; 10^-thermoacido)

Genus: Metallosphaera (5x; 5^-acido)

Genus: Stygiolobus (1x; 1^-thermoacido)

Genus: Sulfolobus (45x; 45^-thermo, 13^-acido, 13^-thermoacido)

Genus: Sulfurisphaera (1x; 1^-acido)

Genus: Sulfurococcus (3x; 3^-acido)

Class: Incertae sedis

Order: Cenarchaeales

Family: Cenarchaeaceae

Genus: Cenarchaeum (1x; 1^-acido)

Kingdom: Archaea Incertae sedis → DPANN group

Superphylum: DPANN group

Phylum: Candidatus Diapherotrites

Class: Diapherotrites Incertae sedis → Iainarchaeum

Order: Diapherotrites Incertae sedis → Iainarchaeum

Family: Diapherotrites Incertae sedis → Iainarchaeum

Genus: Iainarchaeum (1x; 1^-acido)

Phylum: Aenigmarchaeota

Class: (unnamed?)

Order: Aenigmarchaeales

Family: (unnamed?)

Genus: Aenigmarchaeum (1x; 1^-acido)

Phylum: Nanoarchaeota

Class: (unnamed?)

Order: Nanoarchaeales

Family: Nanoarchaeaceae

Genus: Nanoarchaeum (1x; 1^-thermo, 1^-acido, 1^-thermoacido)

Family: Nanopusillaceae

Genus: Nanobsidianus (1x; 1^-thermo, 1^-acido, 1^-thermoacido)

Genus: Nanopusillus (1x; 1^-thermo, 1^-acido, 1^-thermoacido)

Phylum: Incertae sedis

Class: Incertae sedis

Order: Incertae sedis

Family: Incertae sedis

Genus: Candidatus Mancarchaeum (1x; 1^-acido)

Phylum: Candidatus Micrarchaeota

Class: Incertae sedis

Order: Incertae sedis

Family: Incertae sedis

Genus: Candidatus Micrarchaeum (1x; 1^-acido)

Phylum: Candidatus Parvarchaeota

Class: Incertae sedis

Order: Incertae sedis

Family: Incertae sedis

Genus: Candidatus Parvarchaeum (2x; 2^-acido)

Kingdom: Archaea Incertae sedis → euryarchaeota

Superphylum: Archaea Incertae sedis → euryarchaeota

Phylum: Euryarchaeota

Subphylum: Incertae sedis

Class: Archaeoglobi

Order: Archaeoglobales

Family: Archaeoglobaceae

Genus: Archaeoglobus (5x; 5^-thermo)

Subphylum: Stenosarchaea

Class: Stenosarchaea Incertae sedis

Order: Candidatus Nanohaloarchaeota

Family: Nanohaloarchaea

Genus: Haloredivivus ^-haloacido

Genus: Nanosalina ^{-thermohaloacido}

Genus: Nanosalinarum ^-haloacido

Class: Halobacteria

Order: Halobacteriales

Family: Haloarculaceae

Genus: Haloarcula (7x; 7^-halo)

Genus: Halomicrobium (3x; 3^-halo)

Genus: Halorhabdus (?^-halo)

Genus: Halorientalis (?^-halo)

Genus: Halosimplex (?^-halo)

Genus: Natronomonas (6x; 6^-halo, 1^-alkali, 1^-haloalkali)

Family: Halobacteriaceae

Genus: Haladaptatus (4x; 4^-halo)

Genus: Halalkalicoccus (2x; 2^-alkali, 2^-halo, 2^-haloalkali)

Genus: Halarchaeum (1x; 1^-acido, 1^-halo, 1^-haloacido)

Genus: Haloalcalophilium (1x; 1^-alkali, 1^-halo, 1^-haloalkali)

Genus: Halobacterium (4x; 4^-halo)

Genus: Halomarina (3x; 3^-halo)

Genus: Halorussus (?^-halo)

Genus: Natronoarchaeum (4^-halo)

Genus: Salarchaeum (1x; 1^-halo)

Family: Halococceae

Genus: Halococcus

Order: Haloferacales

Family: Haloferacaceae

Genus: Halobellus (9x; 9^-halo)

Genus: Haloferax (14x; 14^-halo)

Genus: Halopelagius (3x; 3^-halo)

Genus: Haloplanus (9x; 9^-halo)

Genus: Haloquadratum (1x; 1^-halo)

Family: Halorubraceae

Genus: Halobaculum (3x; 3^-halo)

Genus: Halogeometricum (1x; 1^-halo)

Genus: Halogranum (4x; 4^-halo)

Genus: Halolamina (6x; 6^-halo)

Genus: Halonotius (4x; 4^-halo)

Genus: Halorubrum (37x; 1^-alkali, 1^-haloalkali, 37^-halo)

Order: Natrialbales

Family: Natrialbaceae

Genus: Halobiforma (3x; 3^-halo)

Genus: Halopiger (6x; 6^-halo)

Genus: Halostagnicola (?^-halo)

Genus: Haloterrigena (?^-halo)

Genus: Halovivax (?^-halo)

Genus: Natrarchaeobaculum (1x, 1^-halo)

Genus: Natrialba (7x; 1^-thermo, 1^-baro, 1^-thermobaro, 1^-alkali, 1^-acido, 1^-alkaliacido, 6^-halo, 1+

Genus: Natrinema (7x; 7^-halo)

Genus: Natronobacterium (2x; 2^-halo, 1^-haloalkali, 1^-alkali)

Genus: Natronococcus (4x; 4^-halo, 3^-haloalkali, 3^-alkali)

Genus: Natronolimnohabitans (1x; 1^-halo)

Genus: Natronolimnobius (1x; 1^-halo)

Genus: Natronorubrum (1x; 1^-halo)

Class: Methanomicrobia

Order: Methanomicrobiales

Family: Methanomicrobiaceae

Genus: Methanogenium (?x; ?^-thermo)

Order: Methanosarcinales

Family: Methanosarcinaceae

Genus: Methanococcoides (?x; ?^-thermo)

Genus: Methanosarcina (?x; ?^-thermo)

Subphylum: Incertae sedis

Class: Methanococci

Order: Methacoccales

Family: Methanococcaceae

Genus: Methanocaldococcus (2x; 1^-thermo, ?**)

Subphylum: Incertae sedis

Class: Methanopyri

Order: Methanopyrales

Family: Methanopyraceae

Genus: Methanopyrus (1x; 1^-thermo)

Subphylum: Incertae sedis

Class: Thermococci

Order: Thermococcales

Family: Thermococcaceae

Genus: Pyrococcus (6x; 6^-thermo, ?**)

Genus: Thermococcus (176x; 176^-thermo, 5^-baro, 1^-acido, 2^-alkali)

Subphylum: Incertae sedis

Class: Thermoplasmata

Order: Methanomassiliicoccales

Family: Methanomassiliicoccaceae

Genus: Methanomassiliicoccus (?x; ?^-acido)

Order: Thermoplasmatales

Family: Cuniculiplasmaceae

Genus: Cuniculiplasma (1x; 1^-acido)

Family: Ferroplasmaceae

Genus: Acidiplasma (2x; 2^-acido)

Genus: Ferroplasma (4x; 4^-acido)

Family: Picrophilaceae

Genus: Picrophilus (2x; 2^-acido)

Family: Thermoplasmataceae

Genus: Thermoplasma (2x; 2^-acido)

Family: Incertae sedis

Genus: Thermogymnomonas (?x; 1^-acido)