science

List of bacterial orders

List of bacterial orders is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of bacterial orders rather than just read about it. In short: This article lists the orders of the Bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI) and the phylogeny is based on 16S rRNA-based LTP release 132 by The All-Species Living Tree Project.

Key takeaways

List of bacterial orders belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of bacterial orders to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of bacterial orders from memory before moving on to harder problems.

Reference excerpt

This article lists the orders of the Bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI) and the phylogeny is based on 16S rRNA-based LTP release 132 by The All-Species Living Tree Project.

Phylogeny National Center for Biotechnology Information (NCBI) taxonomy was initially used to decorate the genome tree via tax2tree. The 16S rRNA-based Greengenes taxonomy is used to supplement the taxonomy particularly in regions of the tree with no cultured representatives. List of Prokaryotic names with Standing in Nomenclature (LPSN) is used as the primary taxonomic authority for establishing naming priorities. Taxonomic ranks are normalised using phylorank and the taxonomy manually curated to remove polyphyletic groups. Cladogram was taken from GTDB release 10-RS226 (16th April 2025).

Kingdom Bacillati

Phylum Chloroflexota

Class "Bathosphaeria" Mehrshad et al. 2018 ?"Bathosphaerales" Mehrshad et al. 2018 [JG30-KF-CM66] Class "Martimicrobia" Williams et al. 2024 ?"Martimicrobiales" Williams et al. 2024 Class "Poriflexia" Kogawa et al. 2022 ?"Ca. Poriflexus" Kogawa et al. 2022 Class "Spiritibacteria" Williams et al. 2024 ?"Spiritibacterales" Williams et al. 2024 Class "Tarhunnaeia" Williams et al. 2024 ?"Tarhunnaeales" Williams et al. 2024 Class "Uliximicrobia" Williams et al. 2024 ?"Uliximicrobiales" Williams et al. 2024 Class "Umbricyclopia" Mehrshad et al. 2018 ?"Umbricyclopales" Mehrshad et al. 2018 (TK10) Class "Dormiibacteria" (sic) Montgomery et al. 2021 (AD3) "Aeolococcales" Montgomery et al. 2021 "Dormibacterales" (sic) Montgomery et al. 2021 Class "Limnocylindria" Mehrshad et al. 2018 "Limnocylindrales" Mehrshad et al. 2018 (SL56) Class Ktedobacteria corrig. Cavaletti et al. 2007 Ktedobacterales corrig. Cavaletti et al. 2007 (Thermogemmatisporales) Class Chloroflexia Gupta et al. 2013 Chloroflexales Gupta et al. 2013 (Herpetosiphonales, Kallotenuales) "Chloroheliales" Tsuji et al. 2024 "Thermobaculales" Chuvochina et al. 2023 Thermomicrobiales Garrity & Holt 2002 (Sphaerobacterales) Class Dehalococcoidia Löffler et al. 2013 "Australimonadales" Prabhu et al. 2024 [UBA2963] Dehalococcoidales Löffler et al. 2013 "Lucifugimonadales" Lim et al. 2023 [UBA1151] "Monstramariales" Landry et al. 2017 [UBA11650; UBA3495] Tepidiformales Kochetkova et al. 2020 Class "Caldilineia" Oren, Parte & Garrity 2016 ex Cavalier-Smith 2020 Aggregatilineales Nakahara et al. 2019 ("Phototrophicales") "Amarolineaceae" Andersen et al. 2019 {SSC4} Anaerolineales Yamada et al. 2006 Ardenticatenales Kawaichi et al. 2013 Caldilineales Yamada et al. 2006 "Epilineales" Petriglieri et al. 2023 "Roseilineaceae" Ward et al. 2021 {J036} "Promineifilales" corrig. Chuvochina et al. 2023 Thermoflexales Dodsworth et al. 2014

Phylum Actinomycetota

Class ?"Syntrophaliphaticia" corrig. Liu et al. 2020 Class "Geothermincolia" Jiao et al. 2021 "Geohydrothermomicrobiales" Pallen, Rodriguez-R & Alikhan 2022 [Fen-727] "Geothermincolales" Jiao et al. 2021 Class "Humimicrobiia" Jiao et al. 2021 "Hakubellales" corrig. Merino et al. 2020 "Humimicrobiales" Jiao et al. 2021 Class CALKMS01 "Geothermocultorales" Jiao et al. 2021 Class "Aquicultoria" Jiao et al. 2021 "Aquicultorales" Jiao et al. 2021 "Oleimmundimicrobiales" Pallen, Rodriguez-R & Alikhan 2022 [UBA3085] "Subteraquimicrobiales" Jiao et al. 2021 Class Coriobacteriia König 2013 Anaerosomatales Khomyakova et al. 2023 Coriobacteriales Stackebrandt et al. 1997 (Eggerthellales) Class Rubrobacteria Suzuki 2013 Rubrobacterales Rainey et al. 1997 Class Thermoleophilia Suzuki & Whitman 2013 Gaiellales Albuquerque et al. 2012 Miltoncostaeales Li et al. 2021 Thermoleophilales Reddy & Garcia-Pichel 2009 (Solirubrobacterales) Class Acidimicrobiia Norris 2013 Acidimicrobiales Stackebrandt, Rainey & Ward-Rainey 1997 ("Benthobacterales", Iamiales) "Actinomarinales" Ghai et al. 2013 "Spongiisociales" corrig. Nguyen 2022 Class Nitriliruptoria Ludwig et al. 2013 Euzebyales Kurahashi et al. 2010 (Egibacterales,Stomatohabitantales) Nitriliruptorales Sorokin et al. 2009 (Egicoccales, Salsipaludibacterales) Class Actinomycetia Salam et al. 2020 Acidothermales Sen et al. 2014 Actinomycetales Buchanan 1917 (Aquipuribacterales; Beutenbergiales; Bifidobacteriales; Bogoriellales; Brevibacteriales; Cellulomonadales; Demequinales; Dermabacterales; Dermatophilales; Microbacteriales; Micrococcales; Kineosporiales; Ruaniales) Jiangellales Tang et al. 2015 Motilibacterales Salam et al. 2020 Mycobacteriales Janke 1924 (Corynebacteriales; Actinocatenisporales; Actinoplanetales; Actinopolysporales; Antricoccales; Cryptosporangiales; Frankiales; Geodermatophilales; Glycomycetales; Jatrophihabitantales; Micromonosporales; Nakamurellales; Phytomonosporales; Pseudonocardiales) "Nanopelagicales" Neuenschwander et al. 2018 Propionibacteriales Patrick & McDowell 2015 Sporichthyales Nouioui et al. 2018 Streptomycetales Kampfer 2015 (Catenulisporales, Kitasatosporales) Streptosporangiales Goodfellow 2015

Phylum "Sysuimicrobiota" Class "Sysuimicrobiia" Liu et al. 2024 [CSP1-3] "Sysuimicrobiales" Liu et al. 2024

Phylum Armatimonadota

Class "Zipacnadia" Carlton et al. 2023 (UBA5377) "Zipacnadales" Carlton et al. 2023 Class Abditibacteriia Tahon et al. 2018 (FBP) Abditibacteriales Tahon et al. 2018 Class Fervidibacteria Nou et al. 2025 Fervidibacterales Nou et al. 2025 Class "Heboniibacteriia" corrig. Carlton et al. 2023 (CAIYQO01) "Heboniibacterales" corrig. Carlton et al. 2023 Class UBA5829 "Candidatus Hippobium" Gilroy et al. 2022 {UBA5829: UBA5829} Class Fimbriimonadia Im et al. 2012 Fimbriimonadales Im et al. 2012 Class Chthonomonadia Oren, Parte & Garrity 2016 Chthonomonadales Lee et al. 2011 Class Armatimonadia Tamaki et al. 2011 (OP10) Armatimonadales Tamaki et al. 2011 (Capsulimonadales)

Phylum Vulcanimicrobiota

Class "Eudoremicrobiia" (sic) Paoli et al. 2022 ?"Eudoremicrobiales" (sic) Paoli et al. 2022 Class "Xenobia" Ji et al. 2021 (UBP9) "Xenobiales" Ji et al. 2021 Class Vulcanimicrobiia Yabe et al. 2024 (WPS2) "Eremiobacterales" Ward, Cardona & Holland-Moritz 2019 Vulcanimicrobiales Yabe et al. 2024 ("Baltobacterales"; "Palusbacterales"; "Rubrimentiphilales")

Phylum Bacillota

Firmicutes incertae sedis Class Desulfitisporia Sorokin & Merkel 2023 Desulfitisporales Sorokin & Merkel 2023 Class Thermolithobacteria Sokolova et al. 2007 Thermolithobacterales Sokolova et al. 2007

Clade Bacillota G

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with List of bacterial orders

Start with the simplest possible case. Write down what List of bacterial orders claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of bacterial orders before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of bacterial orders ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of bacterial orders

In research: List of bacterial orders appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of bacterial orders in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of bacterial orders is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bacteria orders, Lists of bacteria, Taxonomic lists (orders), so understanding it makes those chapters shorter.
In everyday life: Look for List of bacterial orders outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of bacterial orders in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of bacterial orders means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of bacterial orders out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of bacterial orders in simple terms?

Why does List of bacterial orders matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of bacterial orders?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of bacterial orders.