1. 
   Microbe Bacteroidota

   Flexibacter NameName close to Flexibacteraceae
2. 
   Microbe Pseudomonadota

   Chitinibacteraceae NameName close to Flexibacteraceae
3. 
   Microbe Acidobacteriota

   Vicinamibacteraceae NameName close to Flexibacteraceae
4. 
   Microbe Deferribacterota

   Deferribacteraceae NameName close to Flexibacteraceae
5. 
   Microbe Bacillota

   Lawsonibacter MeaningAbout Flexibacteraceae
   58% of healthy people
6. 
   Microbe Chloroflexota

   Flexilinea MeaningAbout Flexibacteraceae
7. 
   Microbe Candidatus Melainabacteria

   Candidatus Obscuribacteraceae NameName close to Flexibacteraceae
8. 
   Microbe Bacteroidota

   Prolixibacteraceae NameName close to Flexibacteraceae
9. 
   Microbe Pseudomonadota

   Immundisolibacteraceae NameName close to Flexibacteraceae
10. Research Systematic and applied microbiology · 2026

    Identification and characterization of four novel gut bacterial taxa: Alvibacillus kangbaii gen. nov., sp. nov., Jutongia huiwenae sp. nov., Flintibacter aciditolerans sp. nov., and Dizhoua hominis gen. nov., sp. nov. isolated from human feces.

    Anaeromassilibacillus senegalensis

    MeaningAbout Flexibacteraceae
    PubMed ↗
11. 
    Microbe Actinomycetota

    Rubneribacter MeaningAbout Flexibacteraceae
    1.9% of healthy people
12. 
    Microbe Bacillota

    Lawsonibacter asaccharolyticus MeaningAbout Flexibacteraceae
    58% of healthy people
13. Research International journal of systematic and evolutionary microbiology · 2022

    Pararoseburia lenta gen. nov., sp. nov. isolated from human faeces.

    Roseburia faecisRoseburia hominis

    MeaningAbout Flexibacteraceae
    PubMed ↗
14. 
    Microbe Candidatus Fermentibacterota

    Candidatus Fermentibacteraceae NameName close to Flexibacteraceae
15. 
    Microbe Bacillota

    Erysipelotrichaceae bacterium 7770_A6 Unnamed strain MeaningAbout Flexibacteraceae
    2.5% of healthy people
16. 
    Microbe Chloroflexota

    Flexilinea flocculi MeaningAbout Flexibacteraceae
17. 
    Microbe Actinomycetota

    Flexivirga MeaningAbout Flexibacteraceae
18. Research Frontiers in microbiology · 2017

    New Insights into the Diversity of the Genus Faecalibacterium.

    Faecalibacterium prausnitzii

    MeaningAbout Flexibacteraceae
    PubMed ↗
19. Research Scientific reports · 2021

    Characterization and description of Faecalibacterium butyricigenerans sp. nov. and F. longum sp. nov., isolated from human faeces.

    Faecalibacterium butyricigeneransFaecalibacterium prausnitzii

    MeaningAbout Flexibacteraceae
    PubMed ↗
20. 
    Microbe Pseudomonadota

    Chujaibacter MeaningAbout Flexibacteraceae
21. 
    Microbe Actinomycetota

    Solirubrobacteraceae MeaningAbout Flexibacteraceae
22. Research International journal of systematic and evolutionary microbiology · 2025 Animal study

    Flavonifractor porci sp. nov. and Flintibacter porci sp. nov., two novel butyrate-producing bacteria of the family Oscillospiraceae.

    Flavonifractor plautii

    MeaningAbout Flexibacteraceae
    PubMed ↗
23. 
    Microbe Bacillota

    Oscillospiraceae bacterium Unnamed strain MeaningAbout Flexibacteraceae
    37% of healthy people
24. Research iScience · 2022

    Exploring clade differentiation of the Faecalibacterium prausnitzii complex.

    Faecalibacterium prausnitzii

    MeaningAbout Flexibacteraceae
    PubMed ↗
25. 
    Microbe Bacillota

    Lawsonibacter faecis MeaningAbout Flexibacteraceae
    6.4% of healthy people
26. 
    Microbe Pseudomonadota

    Caulobacteraceae MeaningAbout Flexibacteraceae
27. 
    Microbe Pseudomonadota

    Lentibacter MeaningAbout Flexibacteraceae
28. 
    Microbe Actinomycetota

    Plantibacter MeaningAbout Flexibacteraceae
    under 1% of healthy people
29. Research Scientific reports · 2025

    Synergy between culturomics and metagenomics of health status-associated gut bacteria originating from non-IBD and IBD populations.

    Bifidobacterium adolescentis

    MeaningAbout Flexibacteraceae
    PubMed ↗
30. 
    Microbe Bacillota

    Faecalibacterium MeaningAbout Flexibacteraceae
    91% of healthy people
31. 
    Microbe Verrucomicrobiota

    Rubritaleaceae MeaningAbout Flexibacteraceae
32. Research Antonie van Leeuwenhoek · 2018

    Description of Mediterraneibacter massiliensis, gen. nov., sp. nov., a new genus isolated from the gut microbiota of an obese patient and reclassification of Ruminococcus faecis, Ruminococcus lactaris, Ruminococcus torques, Ruminococcus gnavus and Clostridium glycyrrhizinilyticum as Mediterraneibacter faecis comb. nov., Mediterraneibacter lactaris comb. nov., Mediterraneibacter torques comb. nov., Mediterraneibacter gnavus comb. nov. and Mediterraneibacter glycyrrhizinilyticus comb. nov.

    Mediterraneibacter gnavus[Ruminococcus] torquesMediterraneibacter faecis

    MeaningAbout Flexibacteraceae
    PubMed ↗
33. Research Avicenna journal of medical biotechnology · 2024

    The Phenotypic and Molecular Identification of Phyllospheric Bacteria Possessing Antimicrobial Activity from Funtumia elastica (Preuss) Stapf.

    Klebsiella pneumoniae

    MeaningAbout Flexibacteraceae
    PubMed ↗
34. 
    Microbe Bacillota

    Irregularibacter MeaningAbout Flexibacteraceae
35. 
    Microbe Actinomycetota

    Tractidigestivibacter scatoligenes MeaningAbout Flexibacteraceae
    under 1% of healthy people
36. Research Cell reports · 2024

    Bifidobacteriaceae diversity in the human microbiome from a large-scale genome-wide analysis.

    Bifidobacterium animalis

    MeaningAbout Flexibacteraceae
    PubMed ↗
37. 
    Microbe Bacillota

    Caproicibacterium MeaningAbout Flexibacteraceae
    under 1% of healthy people
38. 
    Microbe Actinomycetota

    Plantibacter flavus MeaningAbout Flexibacteraceae
    under 1% of healthy people
39. 
    Microbe Actinomycetota

    Paratractidigestivibacter faecalis MeaningAbout Flexibacteraceae
    7.1% of healthy people
40. Research International journal of systematic and evolutionary microbiology · 2019

    Faecalibacillus intestinalis gen. nov., sp. nov. and Faecalibacillus faecis sp. nov., isolated from human faeces.

    Faecalibacillus intestinalis

    MeaningAbout Flexibacteraceae
    PubMed ↗

Research: PubMed, U.S. National Library of Medicine · citations link to PubMed