{{Short description|Genus of bacteria}} {{Speciesbox | greatgreatgreatgrandparent_authority = Katayama ''et al.'' 2024 | greatgreatgrandparent_authority = Katayama ''et al.'' 2024 | greatgrandparent_authority = Katayama ''et al.'' 2024 | grandparent_authority = Katayama ''et al.'' 2024 | parent_authority = Katayama ''et al.'' 2024 | genus = Fidelibacter | species = multiformis | authority = Katayama ''et al.'' 2024 | synonyms = "Marinimicrobia" <small>Rinke ''et al.'' 2013</small> }}
'''''Fidelibacter''''' is a monotypic genus of bacteria. It contains one species, '''''Fidelibacter multiformis'''''. It is in the monotypic family '''Fidelibacteraceae''', monotypic order '''Fidelibacterales''', monotypic class '''Fidelibacteria''' and monotypic phylum '''Fidelibacterota''', previously known as '''"Marinimicrobia"''', '''Marine Group A''' or '''SAR406'''.<ref>{{Cite journal |last=Katayama |first=Taiki |last2=Nobu |first2=Masaru K. |last3=Kamagata |first3=Yoichi |last4=Tamaki |first4=Hideyuki |date=2024 |title=Fidelibacter multiformis gen. nov., sp. nov., isolated from a deep subsurface aquifer and proposal of Fidelibacterota phyl. nov., formerly called Marine Group A, SAR406 or Candidatus Marinimicrobia |url=https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.006558 |journal=International Journal of Systematic and Evolutionary Microbiology |volume=74 |issue=10 |pages=006558 |doi=10.1099/ijsem.0.006558 |issn=1466-5034 |pmc=11652737 |pmid=39465541 |doi-access=free}}</ref><ref name=":02" /><ref name=":0" /> Fidelibacterota has been found mainly at great depths such as the Challenger Deep, the Mariana Trench, and the Puerto Rico Trench. Fidelibacterota has a low representation in shallow pelagic samples and high abundance in deep samples. Although Fidelibacterota is often associated with low dissolved oxygen environments, very little is known about their ecology and metabolic functions.<ref name=":0">Tarn, J., Peoples, L. M., Hardy, K., Cameron, J., & Bartlett, D. H. (2016). [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4860528/ Identification of Free-Living and Particle-Associated Microbial Communities Present in Hadal Regions of the Mariana Trench]. Frontiers in microbiology, 7.</ref> Fidelibacterota is one of the two valid bacterial phyla that does not belong to any kingdom, the other being Vulcanimicrobiota.<ref name=":02">Parte, A.C., Sardà Carbasse, J., Meier-Kolthoff, J.P., Reimer, L.C. and Göker, M. (2020). [https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.004332 List of Prokaryotic names with Standing in Nomenclature (LPSN) moves to the DSMZ]. ''International Journal of Systematic and Evolutionary Microbiology'', '''70''', 5607-5612; DOI: 10.1099/ijsem.0.004332</ref>
== References == {{Reflist}} {{Bacteria classification}} {{Life on Earth}} {{Taxonbar|from1=Q134283829|from2=Q26970560}} Category:Monotypic bacteria genera {{Bacteria-stub}}