1. 
   Microbe Thermoplasmatota

   Methanomassiliicoccus NameName close to Methanomassiliicoccales
   under 1% of healthy people
2. 
   Microbe Thermoplasmatota

   Candidatus Methanomassiliicoccus intestinalis NameName close to Methanomassiliicoccales
   under 1% of healthy people
3. 
   Microbe Thermoplasmatota

   Methanomassiliicoccaceae archaeon DOK NameName close to Methanomassiliicoccales
   under 1% of healthy people
4. 
   Microbe Thermoplasmatota

   Methanomassiliicoccus luminyensis NameName close to Methanomassiliicoccales
5. 
   Microbe Thermoplasmatota

   Methanomethylophilus KeywordIts page mentions Methanomassiliicoccales
   under 1% of healthy people
6. Research Microorganisms · 2023

   Methanomethylophilus alvi gen. nov., sp. nov., a Novel Hydrogenotrophic Methyl-Reducing Methanogenic Archaea of the Order Methanomassiliicoccales Isolated from the Human Gut and Proposal of the Novel Family Methanomethylophilaceae fam. nov.

   Eggerthella lenta

   MeaningAbout Methanomassiliicoccales
   PubMed ↗
7. 
   Microbe Thermoplasmatota

   Candidatus Methanogranum KeywordIts page mentions Methanomassiliicoccales
8. 
   Microbe Thermoplasmatota

   Methanomethylophilus alvi KeywordIts page mentions Methanomassiliicoccales
   under 1% of healthy people
9. 
   Microbe Thermoplasmatota

   Candidatus Methanomethylophilus sp. 1R26 Unnamed strain KeywordIts page mentions Methanomassiliicoccales
   under 1% of healthy people
10. 
    Microbe Methanobacteriota

    Methanosphaera MeaningAbout Methanomassiliicoccales
    1.8% of healthy people
11. 
    Microbe Actinomycetota

    Senegalimassilia MeaningAbout Methanomassiliicoccales
    20% of healthy people
12. 
    Microbe Bacillota

    Ruminococcus sp. AF13-28 Unnamed strain MeaningAbout Methanomassiliicoccales
    18% of healthy people
13. Research Access microbiology · 2023

    Ruminococcus gnavus bacteraemia showing morphological diversity on Gram staining: a case report and literature review.

    Mediterraneibacter gnavus

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
14. Research Anaerobe · 2023 Review

    Ruminococcus gnavus bacteremia: Literature review and a case report associated with acute flare of ulcerative colitis in an immunocompromised patient.

    Mediterraneibacter gnavus

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
15. 
    Microbe Methanobacteriota

    Methanosphaera cuniculi MeaningAbout Methanomassiliicoccales
    under 1% of healthy people
16. 
    Microbe Methanobacteriota

    Methanosphaera stadtmanae MeaningAbout Methanomassiliicoccales
    1.8% of healthy people
17. Research Acta clinica Belgica · 2018

    Ruminococcus gnavus bacteremia, an uncommon presentation of a common member of the human gut microbiota: case report and literature review.

    Mediterraneibacter gnavus

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
18. 
    Microbe Bacillota

    Ruminococcaceae bacterium Marseille-P2935 Unnamed strain MeaningAbout Methanomassiliicoccales
    under 1% of healthy people
19. 
    Microbe Methanobacteriota

    Methanocorpusculum MeaningAbout Methanomassiliicoccales
20. 
    Microbe Methanobacteriota

    Methanobacterium MeaningAbout Methanomassiliicoccales
    under 1% of healthy people
21. 
    Microbe Bacillota

    Roseburia faecis MeaningAbout Methanomassiliicoccales
    68% of healthy people
22. 
    Microbe Methanobacteriota

    Methanobrevibacter MeaningAbout Methanomassiliicoccales
    18% of healthy people
23. Research EBioMedicine · 2019

    Co-culture of Methanobrevibacter smithii with enterobacteria during urinary infection.

    Klebsiella pneumoniaeEnterococcus faecium

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
24. Research Heliyon · 2023

    A case of bloodstream infection caused by Ruminococcus gnavus without gastrointestinal involvement.

    Mediterraneibacter gnavus

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
25. 
    Microbe Methanobacteriota

    Methanosarcina MeaningAbout Methanomassiliicoccales
    under 1% of healthy people
26. Research Respirology case reports · 2026

    First Case of Acute Pleural Empyema Caused by Mediterraneibacter gnavus.

    Mediterraneibacter gnavus

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
27. 
    Microbe Actinomycetota

    Senegalimassilia faecalis MeaningAbout Methanomassiliicoccales
    3.4% of healthy people
28. 
    Microbe Methanobacteriota

    Methanobacteriaceae MeaningAbout Methanomassiliicoccales
29. 
    Microbe Bacillota

    Clostridiaceae bacterium Marseille-Q3526 Unnamed strain MeaningAbout Methanomassiliicoccales
    13% of healthy people
30. 
    Microbe Methanobacteriota

    Methanothrix MeaningAbout Methanomassiliicoccales
31. Research Gut microbes · 2023

    Temperate bacteriophages infecting the mucin-degrading bacterium Ruminococcus gnavus from the human gut.

    Mediterraneibacter gnavus

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
32. 
    Microbe Bacillota

    Mediterraneibacter gnavus MeaningAbout Methanomassiliicoccales
    62% of healthy people
33. 
    Microbe Bacillota

    Clostridiaceae bacterium Marseille-Q4143 Unnamed strain MeaningAbout Methanomassiliicoccales
    43% of healthy people
34. Research International journal of systematic and evolutionary microbiology · 2021

    Sporofaciens musculi gen. nov., sp. nov., a novel bacterium isolated from the caecum of an obese mouse.

    Dorea longicatenaMediterraneibacter gnavusDorea formicigenerans

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
35. 
    Microbe Actinomycetota

    Senegalimassilia anaerobia MeaningAbout Methanomassiliicoccales
    17% of healthy people
36. 
    Microbe Bacillota

    Blautia faecis MeaningAbout Methanomassiliicoccales
    77% of healthy people
37. 
    Microbe Bacillota

    Ruminococcus sp. AF41-9 Unnamed strain MeaningAbout Methanomassiliicoccales
    10% of healthy people
38. 
    Microbe Methanobacteriota

    Methanobrevibacter smithii MeaningAbout Methanomassiliicoccales
    18% of healthy people
39. Research Cell host & microbe · 2023

    Association of distinct microbial signatures with premalignant colorectal adenomas.

    Flavonifractor plautiiBacteroides stercoris

    MeaningAbout Methanomassiliicoccales
    PubMed ↗
40. 
    Microbe Bacillota

    Anaerotignum faecicola MeaningAbout Methanomassiliicoccales
    47% of healthy people

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