Natura - nature
actualia - actual entities
Mundus Plinius - physical world
naturalia - natural bodies
Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Domain Bacteria Woese et al. 2024
Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
Phylum Bacillotaᵀ Gibbons and Murray 2021
Class Clostridia Rainey 2010
Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
01 Genus Anaerotalea Frolova et al. 2021, incertae sedis
02 Genus Brotomerdimonas Hitch et al. 2025, incertae sedis
03 Genus Fenollaria Pagnier et al. 2018, incertae sedis
04 Genus Fusibacter Ravot et al. 1999, incertae sedis
05 Genus Guggenheimella Wyss et al. 2005, incertae sedis [monotypic]
06 Genus Hominibacterium Borhanudin et al. 2024, incertae sedis
07 Genus Kallipyga Hugon et al. 2016, incertae sedis
08 Genus Lentihominibacter Liu et al. 2022, incertae sedis
09 Genus "Anaerocellum" Svetlichny et al. 1990 nom. inval., incertae sedis
10 Genus "Bariatricus" Bessis et al. 2016 nom. inval., incertae sedis
11 Genus "Levyella" La Scola et al. 2011 nom. inval., incertae sedis
12 Genus "Massilicoli" Ndongo et al. 2019 nom. inval., incertae sedis
13 Genus "Sinanaerobacter" Bao et al. 2021 nom. inval., incertae sedis
14 Genus "Zhenpiania" Liu et al. 2021 nom. inval., incertae sedis
15 Genus "Candidatus Acetocimmeria" Smith et al. 2021 nom. pro-inval., incertae sedis
16 Genus "Candidatus Alectryocaccomicrobium" Gilroy et al. 2022, incertae sedis
17 Genus "Candidatus Allochristensenella" Glendinning et al. 2022, incertae sedis
18 Genus "Candidatus Aphodomonas" Gilroy et al. 2022, incertae sedis
19 Genus "Candidatus Aphodomorpha" Gilroy et al. 2022, incertae sedis
20 Genus "Candidatus Apopatosoma" Gilroy et al. 2022 nom. pro-inval., incertae sedis
21 Genus "Candidatus Apopatousia" Gilroy et al. 2022 nom. pro-inval., incertae sedis
22 Genus "Candidatus Avichristensenella" Gilroy et al. 2022, incertae sedis
23 Genus "Candidatus Avimonas" Glendinning et al. 2022, incertae sedis
24 Genus "Candidatus Avispirillum" Glendinning et al. 2022, incertae sedis
25 Genus "Candidatus Caccalectryoclostridium" Gilroy et al. 2022, incertae sedis
26 Genus "Candidatus Caccovivens" Gilroy et al. 2022, incertae sedis
27 Genus "Candidatus Coliplasma" Gilroy et al. 2022 nom. pro-inval., incertae sedis
28 Genus "Candidatus Darwinibacterium" Gilroy et al. 2022 nom. pro-inval., incertae sedis
29 Genus "Candidatus Egerieenecus" Gilroy et al. 2022, incertae sedis
30 Genus "Candidatus Excrementavichristensenella" Gilroy et al. 2022, incertae sedis
31 Genus "Candidatus Faecaligallichristensenella" Gilroy et al. 2022, incertae sedis
32 Genus "Candidatus Faecimorpha" Gilroy et al. 2022, incertae sedis
33 Genus "Candidatus Faecivicinus" Gilroy et al. 2022, incertae sedis
34 Genus "Candidatus Fimadaptatus" Gilroy et al. 2022, incertae sedis
35 Genus "Candidatus Fimimonas" Gilroy et al. 2022, incertae sedis
36 Genus "Candidatus Flemingiibacterium" corrig. Glendinning et al. 2022, incertae sedis
37 Genus "Candidatus Gallispira" Glendinning et al. 2022, incertae sedis
38 Genus "Candidatus Geddesella" Glendinning et al. 2022, incertae sedis
39 Genus "Candidatus Heritagella" Glendinning et al. 2022, incertae sedis
40 Genus "Candidatus Howiella" Glendinning et al. 2022, incertae sedis
41 Genus "Candidatus Hydrogenisulfobacillus" Hogendoorn et al. 2023 nom. pro-inval., incertae sedis
42 Genus "Candidatus Limadaptatus" Gilroy et al. 2022, incertae sedis
43 Genus "Candidatus Limiplasma" Gilroy et al. 2022, incertae sedis
44 Genus "Candidatus Metalachnospira" Glendinning et al. 2022, incertae sedis
45 Genus "Candidatus Neochristensenella" Glendinning et al. 2022, incertae sedis
46 Genus "Candidatus Onthenecus" Gilroy et al. 2022, incertae sedis
47 Genus "Candidatus Ornithocaccomicrobium" Gilroy et al. 2022, incertae sedis
48 Genus "Candidatus Ornithoclostridium" Gilroy et al. 2022, incertae sedis
49 Genus "Candidatus Ornithomonoglobus" Gilroy et al. 2022, incertae sedis
50 Genus "Candidatus Parachristensenella" Glendinning et al. 2022, incertae sedis
51 Genus "Candidatus Pelethousia" Gilroy et al. 2022, incertae sedis
52 Genus "Candidatus Pullichristensenella" Gilroy et al. 2022, incertae sedis
53 Genus "Candidatus Spyradocola" Gilroy et al. 2022, incertae sedis
54 Genus "Candidatus Stercoripulliclostridium" Gilroy et al. 2022, incertae sedis
55 Genus "Candidatus Tabaqchalia" Glendinning et al. 2022, incertae sedis
56 Genus "Candidatus Timburyella" Glendinning et al. 2022, incertae sedis
57 Genus "Candidatus Ventricola" Gilroy et al. 2022 nom. pro-illeg., incertae sedis
58 Genus "Candidatus Woodwardiibium" corrig. Glendinning et al. 2022, incertae sedis
59 Family Anaerozeibacteraceae El Houari et al. 2025 [monotypic]
60 Family Aristaeellaceae Mahoney-Kurpe et al. 2023 [monotypic]
61 Family Caldicoprobacteraceae Yokoyama et al. 2010 [monotypic]
62 Family Carboxydocellaceae Chuvochina et al. 2024 [monotypic]
63 Family Christensenellaceae Morotomi et al. 2012
64 Family Clostridiaceae Pribram 1933 (Approved Lists 1980)
65 Family Defluviitaleaceae Jabari et al. 2012 [monotypic]
66 Family Desulfitobacteriaceae Stackebrandt 2020
67 Family Eubacteriaceae Ludwig et al. 2010
68 Family Gracilibacteraceae Lee et al. 2010 [monotypic]
69 Family Heliobacteriaceae Madigan and Asao 2010
70 Family Lachnospiraceae Rainey 2010
71 Family Oscillospiraceae Peshkoff 1940 (Approved Lists 1980)
72 Family Peptococcaceae Rogosa 1971 (Approved Lists 1980)
73 Family Proteinivoracaceae corrig. Kevbrin et al. 2014
74 Family Pumilibacteraceae Afrizal et al. 2024
75 Family Symbiobacteriaceae Shiratori-Takano et al. 2014 [monotypic]
76 Family Tepidibacteraceae Bello et al. 2024
77 Family Vallitaleaceae Quéméneur et al. 2019
78 Family Xylanivirgaceae Liu et al. 2020 [monotypic]
79 Family "Bianqueaceae" Liu et al. 2021 nom. inval. [monotypic]
80 Family "Feifaniaceae" Liu et al. 2021 nom. inval. [monotypic]
81 Family "Maliibacteriaceae" Traore et al. 2023 nom. inval. [monotypic]
82 Family "Sulfobacillaceae" Cavalier-Smith and Chao 2020 nom. inval. [monotypic]
83 Family "Yeguiaceae" Liu et al. 2021 nom. inval. [monotypic]
84 Family "Candidatus Betainaceae" Jones et al. 2021 [monotypic]