'The All-Species Living Tree' Project

'The All-Species Living Tree' Project is a collaboration between various academic groups/institutes, such as ARB, SILVA rRNA database project, and LPSN, with the aim of assembling a database of 16S rRNA sequences of all validly published species of Bacteria and Archaea.^[1] At one stage, 23S sequences were also collected,^[2] but this has since stopped.^[3]

'The All-Species Living Tree' Project logo

Currently there are over 10,950 species in the aligned dataset and several more are being added either as new species are discovered or species that are not represented in the database are sequenced. Initially the latter group consisted of 7% of species.

Similar (and more recent) projects include the Genomic Encyclopedia of Bacteria and Archaea (GEBA), which focused on whole genome sequencing of bacteria and archaea.^[4][5]

Tree

See also: Bacterial phyla

The tree was created by maximum likelihood analysis without bootstrap: consequently accuracy is traded off for size and many phylum level clades are not correctly resolved (such as the Firmicutes). (Eukaryotes not present in analysis). This phylogeny is a summary of the 16S rRNA based LTP_08_2023 and contains all type species with validly published names up to August 2023.^[6][7][8]

	Domain Archaea Methanopyri Crenarchaeida Nitrososphaerota Thermoproteota Euryarchaeota Methanococci Thermoplasmata "Archaeoglobia" Thermococci Methanobacteria Methanonatronarchaeia Methanomicrobia Halobacteria {"Euryarchaeida"}
	Nanobdellales Domain Bacteria "Aquificida" "Thermosulfidibacterota" Aquificota "Synergistetes" Caldisericota Synergistota Coprothermobacterota Thermotogota Atribacterota Syntrophorhabdia Thermotomaculales Spirochaetota Firmicutes 3 Dictyoglomota "Caldicellulosiruptorales" "Thermosediminibacteria" [incl. "Ammonificales", "Brockiales"] "Thermoanaerobacteria" [incl. Thermanaeromonas, Desulfovirgula] "FCB group" Fibrobacteria {Fibrobacterota} Gemmatimonadota Calditrichota Ignavibacteriota Chlorobiota Rhodothermota Balneolota Bacteroidota "Melainabacteria" "Cyanobacteriota" Armatimonadota Chloroflexota Deinococcota Firmicutes 2 "Sulfobacillia" "Thermaerobacteria" "Carboxydothermales" "Thermacetogeniales" Moorellales {"Moorellia"} "Calderihabitantales" "Koleobacterales" Zhaonellaceae "Desulfitibacterales" "Syntrophomonadia" Gelria "Symbiobacteriia" Actinomycetota "Thermodesulfobiota" Elusimicrobiota Nitrospirota "Halanaerobiia" Acidobacteriota Chitinivibrionia "Planctobacteria" "Abditibacteriota" Chlamydiota Lentisphaerota Kiritimatiellota Verrucomicrobiota Planctomycetota "Firmicutes" 1 Thermolithobacteria "Carboxydocellales" "Thermincolia" "Desulfofundulaceae" "Hydrogenisporia" "Selenomonadia" Limnochordia "Desulfotomaculota" "Clostridiia" Fusobacteriota Mycoplasmatota Bacillota "Hydrobacterida" Thermodesulfobacteriota "Deferrisomatota" "Bradymonadia" Myxococcota "Desulfuromonadota" Bdellovibrionota Desulfobacterota Desulfovibrionia Campylobacterota Chrysiogenota Deferribacterota Pseudomonadota

See also

• Branching order of bacterial phyla (Woese, 1987)
• Branching order of bacterial phyla (Gupta, 2001)
• Branching order of bacterial phyla (Cavalier-Smith, 2002)
• Branching order of bacterial phyla (Rappe and Giovanoni, 2003)
• Branching order of bacterial phyla (Battistuzzi et al., 2004)
• Branching order of bacterial phyla (Ciccarelli et al., 2006)
• Branching order of bacterial phyla (Genome Taxonomy Database, 2018)
• Bacterial phyla
• List of Archaea genera
• List of bacteria genera
• List of bacterial orders
• LPSN, list of accepted bacterial and archaeal names