X-Philes Master List

This page is under construction.

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

Class: Nitrososphaeria (14x; 14^-acido)

Order: Nitrosopumilales

Family: Nitrosopumilaceae (10x; 10^-acido)

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

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

Order: Nitrososphaerales

Family: Nitrososphaeraceae(4x; 4^-acido)

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 (1x; 1^-haloacido)

Genus: Nanosalina (1x; 1^{-thermohaloacido})

Genus: Nanosalinarum (1x; 1^-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, 4^-radio)

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

Genus: Halorussus (?^-halo)

Genus: Natronoarchaeum (4x; 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 (?x; ?^-halo)

Genus: Haloterrigena (?x; ?^-halo)

Genus: Halovivax (?x; ?^-halo)

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

Genus: Natrialba (7x; 1^-thermo, 1^-baro, 1^-thermobaro, 1^-alkali, 1^-acido, 1^-alkaliacido, 6^-halo, 7^-radio, 7^-hypobaro, 7^-cryo, 7^-xero, 7^{-cryohypobaroxero})

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, 6^-radio, 2^-baro, 2^{-radiothermobaro})

Genus: Thermococcus (38x; 38^-thermo, 38^-radio, 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)

Domain: Bacteria

Kingdom: Fibrobacteres/Chlorobi/Bacteroidetes group

Superphylum: Bacteroides/Chlorobi group

Phylum: Bacteroidetes

Class: Bacteroidia

Order: Bacteroidales

Family: Bacteroidaceae

Genus: Bacteroides (39x; 39^-cryo)

Class: Cytophagia

Order: Cytophagales

Family: Cytophagaceae

Genus: Cytophaga (1x; 1^-cryo)

Kingdom: Terrabacteria

Phylum: Actinobacteria

Class: Acidimicrobiia

Order: Acidimicrobiales

Family: Acidimicrobiaceae

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

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

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

Class: Actinomycetia

Order: Micrococcales

Family: Brevibacteriaceae

Genus: Brevibacterium (36x; 36^-cryo)

Family: Microbacteriaceae

Genus: Cryobacterium (7x; 7^-cryo)

Family: Micrococcaceae

Genus: Arthrobacter (54x; 54^-cryo, ?1^-hypergeo?)

Class: Rubrobacteria

Order: Rubrobacterales

Family: Rubrobacteraceae

Genus: Rubrobacter (8x; 8^-radio)

Phylum: Cyanobacteria/Melainabacteria group

Class: Cyanobacteria

Order: Chroococcidiopsidales

Family: Chroococcidiopsidaceae

Genus: Chroococcidiopsis (?^-radiocryo+?)

Phylum: Deinococcota (formerly Deinococcus-Thermus)

Class: Deinococci

Order: Deinococcales

Family: Deinococcaceae

Genus: Deinococcus (85x; 85^-cryo, 85^-hypobaro, 85^-xero, 85^-radio, ?85+)

Phylum: Firmicutes

Class: Bacilli

Order: Bacillales

Family: Alicyclobacillaceae

Genus: Alicyclobacillus (1x; 1^-thermo, 1^-acido, 1^{-thermoacido, 1-spore)}

Family: Bacillaceae

Genus: Bacillus (91x; 91^-spore, 6^-thermo, 1^-acido, ?^{-thermoacido?})

Genus: Virgibacillus (34x; 34^-spore, 9^-halo)

Family: Incertae sedis

Genus: Exiguobacterium (?^-hypobaro)

Class: Clostridia

Order: Eubacteriales

Family: Clostridiaceae

Genus: Anoxynatronum (1x; 1^-alkali)

Genus: Clostridium (155x; 155^-spore)

Family: Peptococcaceae

Genus: Desulfotomaculum (31x; 31^-spore, 17^-thermo, 1^-alkali, 3^-halo, ?^-poly?)

Family: Incertae sedis

Genus: Sulfobacillus (5x; 5^-acido, 5^-spore)

Kingdom: Bacteria Incertae sedis → acidobacteria/acidobacteriota

Phylum: Acidobacteria/acidobacteriota

Class: Acidobacteriia

Order: Acidobacteriales

Family: Acidobacteriaceae

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

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

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

Kingdom: Bacteria Incertae sedis → aquificae

Phylum: Aquificae

Class: Aquificidae

Order: Aquificales

Family: Aquifaceae

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

Genus: Hydrogenobacter (3x; 3^-thermo, 2^-acido, 2^-thermoacido)

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

Kingdom: Bacteria Incertae sedis → desulfobacteriota

Phylum: Desulfobacteriota

Class: Thermodesulfobacteria

Order: Thermodesulfobacteriales

Family: Thermodesulfobacteriaceae

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

Kingdom: Bacteria Incertae sedis → nirospirae

Phylum: Nitrospirae

Class: Nitrospira

Order: Nitrospirales

Family: Nitrospiraceae

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

Kingdom: Bacteria Incertae sedis → proteobacteria

Phylum: Proteobacteria

Class: Acidithiobacilla

Order: Acidithiobacillales

Family: Acidithiobacillaceae

Genus: Acidithiobacillus (7x; 7^-acido)

Class: Alphaproteobacteria

Order: Rhodospirallales

Family: Acetobacteraceae

Genus: Acetobacter (29x; 29^-acido)

Genus: Acidiphilium (6x; 6^-acido)

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

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

Order: Hyphomonadales

Family: Hyphomonadaceae

Genus: Hyphomonas (11x; 11^-cryo)

Class: Betaproteobacteria

Order: Burkholderiales

Family: Alcaligenaceae

Genus: Achromobacter (22x; 22^-cryo)

Genus: Alcaligenes (4x; 4^-cryo)

Family: Comamonadaceae

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

Order: Neisseriales

Family: Chromobacteriaceae

Genus: Aquaspirillum (6x; 6^-cryo)

Order: Nitrosomonadales

Family: Gallionellaceae

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

Family: Thiobacillaceae

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

Class: Gammaproteobacteria

Order: Alteromonadales

Family: Alteromonadaceae

Genus: Alteromonas (29x; 29^-cryo)

Family: Colwelliaceae

Genus: Colwellia (23x; 23^-cryo, 23^-baro, 23^-cryobaro)

Family: Shewanellaceae

Genus: Shewanella (8x; 8+^-cryo, 7+^-baro, 7+^-cryobaro)

Order: Chromatiales

Family: Ectothiorhodospiraceae

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

Genus: Thiohalospira (1x; 1^-alkali, 1^-haloacido, 1^-haloalkali)

Order: Pseudomonadales

Family: Moraxellaceae

Genus: Psychrobacter (35x; 35^-cryo, 35^-radio)

Family: Pseudomonadaceae

Genus: Pseudomonas (5x; 5^-cryo)

Clade: Delta/Epsilon subdivisions

Class: Deltaproteobacteria

Order: Desulfobacterales

Family: Desulfobacteraceae

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

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

Family: Desulfobulbaceae

Genus: Desulfobulbus (5x; 5^-halo)

Order: Desulfovibrionales

Family: Desulfomicrobiaceae

Genus: Desulfomicrobium (2x; 1^-thermo, 1^-acido+)

Family: Desulfovibrionaceae

Genus: Desulfovibrio (3x; 1^-thermo, 1^-acido, 1^-halo)

Class: Epsilonproteobacteria

Order: Campylobacterales

Family: Helicobacteraceae

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

Kingdom: Bacteria Incertae sedis → thermotogae

Phylum: Thermotogae

Class: ???

Order: Thermotogales

Family: Thermotogaceae

Genus: Thermotoga (11x; 11^-thermo)