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The Veillonellaceae are a family of the Clostridia, formerly known as Acidaminococcaceae. Bacteria in this family are grouped together mainly based on genetic studies, which place them among the Bacillota. Supporting this placement, several species are capable of forming endospores. However, they differ from most other Bacillota in having Gram-negative stains. The cell wall composition is peculiar.

Members of this family are all obligate anaerobes, and occur in habitats such as rivers, lakes, and the intestines of vertebrates. They range from spherical forms, such as Megasphaera and Veillonella, to curved rods, as typified by the Selenomonads. Selenomonas has a characteristic crescent-shape, with flagella inserted on the concave side, while Sporomusa is similar but non-motile. Their names refer to this distinctive morphology: selene means moon, and musa means banana.

The name Selenobacteria also refers to some this group.

The description of this family was emended in 2010 and, together with the Acidaminococcaceae (familia nova, which means a newly coined taxa), it was placed in the order Selenomonadales (ordo novus) in the class Negativicutes (classis novus) of the phylum Bacillota.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)

See also

• List of bacteria genera
• List of bacterial orders

References

1. ITIS
2. J.P. Euzéby. "Veillonella". List of Prokaryotic names with Standing in Nomenclature (LPSN). Archived from the original on 2013-01-27. Retrieved 2013-03-20.
3. H, Marchandin; C, Teyssier; J, Campos; H, Jean-Pierre; F, Roger; B, Gay; Jp, Carlier; E, Jumas-Bilak (2010). "Negativicoccus succinicivorans gen. nov., sp. nov., isolated from human clinical samples, emended description of the family Veillonellaceae and description of Negativicutes classis nov., Selenomonadales ord. nov. and Acidaminococcaceae fam. nov. in the bacterial phylum Firmicutes". International Journal of Systematic and Evolutionary Microbiology. 60 (6): 1271–1279. doi:10.1099/ijs.0.013102-0. PMID 19667386.
4. J.P. Euzéby. "Veillonellaceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2022-09-09.
5. Sayers; et al. "Veillonellaceae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2022-09-09.
6. "The LTP". Retrieved 23 February 2022.
7. "LTP_all tree in newick format". Archived from the original on 4 September 2022. Retrieved 23 February 2022.
8. "LTP_01_2022 Release Notes" (PDF). Retrieved 23 February 2022.
9. "GTDB release 07-RS207". Genome Taxonomy Database. Retrieved 20 June 2022.
10. "bac120_r207.sp_labels". Genome Taxonomy Database. Retrieved 20 June 2022.
11. "Taxon History". Genome Taxonomy Database. Retrieved 20 June 2022.

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