Order of bacteria
The Thermoanaerobacterales is a polyphyletic order of bacteria placed within the polyphyletic class Clostridia , and encompassing four families: the Thermoanaerobacteraceae , the Thermodesulfobiaceae , the Thermoanaerobacterales Family III. Incertae Sedis , and the Thermoanaerobacterales Family IV. Incertae Sedis , and various unplaced genera.[1]
This order is noted for the species' abilities to survive in extreme environments without oxygen and of relatively elevated temperatures for a living being (up to 80-90 °C). An example organism in this order is Thermoanaerobacter ethanolicus .[2]
The Thermoanaerobacterales, as previously mentioned, is polyphyletic , and consists of numerous morphologically similar clades:
LPSN [3] & NCBI [1] 16S rRNA based LTP _01_2022[4] & 120 marker proteins based GTDB 07-RS207[5] "Desulfovirgulaceae" "Ammonificales" "Carboxydothermales" "Mahellales" "Mahellaceae" Mahella Bonilla Salinas et al. 2004 Moorellales Lv et al. 2020 Calderihabitantaceae Lv et al. 2020 Desulfitibacteraceae Lv et al. 2020 Moorellaceae Lv et al. 2020 "Thermacetogeniaceae" "Caldicellulosiruptorales" Bing et al. 2023 "Caldicellulosiruptoraceae" Bing et al. 2023 Thermoanaerobacterales Wiegel 2010 "Thermodesulfobiales" Cavalier-Smith 2020 Thermosediminibacterales Zhang et al. 2019
16S rRNA based LTP _08_2023[4] [6] [7] 120 marker proteins based GTDB 08-RS214.[5] [8] [9] "Carboxydothermales" * "Thermacetogeniales" *
"Calderihabitantales" * Koleobacterales
"Dictyoglomerales" "Caldicellulosiruptorales" *
DSM‑12270 * "Moorellia" * "Calderihabitantales" "Desulfitibacterales"
"Carboxydocellia" "Thermincolia" "Thermincolales"
"Carboxydothermia" * "Desulfotomaculia"
"Thermoanaerobacteria" * "Caldicellulosiruptorales" Thermoanaerobacterales
"Clostridiia " s.s.
Note:
polyphyletic Thermoanaerobacterales
Terrabacteria BV1, BV3, BV5
others Cyanoprokaryota Cyanobacteriota "Margulisiibacteriota " "Marinamargulisbacteria" "Riflemargulisbacteria" "Saganbacteria" "Termititenacia" Firmicutes BV3 Low GC Bacillota Bacillota A "Clostridiia " "Thermoanaerobacteria" "Thermosediminibacteria" Bacillota D Bacillota E "Sulfobacillia" "Symbiobacteriia" "Thermaerobacteria" Bacillota G "Hydrogenisporia" Limnochordia "Desulfotomaculota " "Carboxydocellia" "Carboxydothermia" "Dehalobacteriia" "Desulfitobacteriia" "Desulfotomaculia" "Moorellia" "Peptococcia" "Syntrophomonadia" "Thermincolia" "Halanaerobiaeota" "Selenobacteria"
CPR group Thermotogida
Fusobacterida Hydrobacteria BV2, BV4
others