Paracoccaceae

Paracoccaceae
Scientific classification Edit this classification
Domain: Bacteria
Kingdom: Pseudomonadati
Phylum: Pseudomonadota
Class: Alphaproteobacteria
Order: Rhodobacterales
Family: Paracoccaceae
Liang et al. 2022[1]
Type genus
Paracoccus
Davis 1969 (Approved Lists 1980)
Genera[1]

See text

Synonyms[1]
  • Rhodobacteraceae Garrity et al. 2006

Paracoccaceae is a family of bacteria in the order Rhodobacterales, class Alphaproteobacteria, and phylum Pseudomonadota. Its type genus is Paracoccus.[1] Members occur in marine, freshwater, and terrestrial environments; many have been isolated from low-salinity habitats and do not require sodium chloride for growth.[2]

Taxonomy

The family was historically classified under the name Rhodobacteraceae. Although that name was validly published, it is illegitimate under Rule 51b(1) of the International Code of Nomenclature of Prokaryotes because its original circumscription included Hyphomonas, the type genus of the previously named family Hyphomonadaceae.[3]

Genome-based analysis separated the predominantly marine "Roseobacter clade" from the broadly circumscribed Rhodobacteraceae and placed it in the family Roseobacteraceae.[2] Paracoccaceae was subsequently validly published for the family containing Paracoccus, Rhodobacter, and related genera. LPSN treats Paracoccaceae as the correct name and Rhodobacteraceae as a heterotypic synonym.[4][1][3]

Genera

The List of Prokaryotic names with Standing in Nomenclature recognizes the following 55 genera with validly published and correct names. Synonyms, provisional names, and misspellings are excluded.[1]

Phylogeny

The genus-level tree below was pruned from the 120-marker-protein reference tree of GTDB release R11-RS232.[5][6] GTDB retains the broader family name Rhodobacteraceae, and its generic assignments differ from those of LPSN.[7] Consequently, only genera with validly published and correct LPSN names that occur under the same genus name in GTDB are shown.[1]

120 marker protein-based GTDB R11-RS232[5][6]
Paracoccaceae (LPSN)

Cypionkella

Fuscibacter

Tabrizicola

Pseudogemmobacter

Neotabrizicola

Ruixingdingia

Halodurantibacterium

Abyssibius

Pontivivens

Paroceanicella

Pikeienuella

Thermohalobaculum

Rubrimonas

The following accepted genera are not represented under the same genus name in the GTDB R11-RS232 species-label tree and have been omitted: Allgaiera, Arenibacillus, Coraliihabitans, Falsigemmobacter, Hahyoungchilella, Limibaculum, Methylarcula, Neptunicoccus, Paludibacillus, Paralimibaculum, Rubribacterium, and Xinfangfangia.

References

  1. 1 2 3 4 5 6 7 "Family: Paracoccaceae". List of Prokaryotic names with Standing in Nomenclature. Leibniz Institute DSMZ. Retrieved 17 August 2026.
  2. 1 2 Liang, Kevin Y. H.; Orata, Fabini D.; Boucher, Yann F.; Case, Rebecca J. (2021). "Roseobacters in a sea of poly- and paraphyly: whole genome-based taxonomy of the family Rhodobacteraceae and the proposal for the split of the "Roseobacter clade" into a novel family, Roseobacteraceae fam. nov". Frontiers in Microbiology. 12 683109. doi:10.3389/fmicb.2021.683109. PMC 8267831. PMID 34248901.
  3. 1 2 "Family: Rhodobacteraceae". List of Prokaryotic names with Standing in Nomenclature. Leibniz Institute DSMZ. Retrieved 17 August 2026.
  4. ↑ Göker, Markus (2022). "Filling the gaps: missing taxon names at the ranks of class, order and family". International Journal of Systematic and Evolutionary Microbiology. 72 (12) 005638. doi:10.1099/ijsem.0.005638. PMID 36748602.
  5. 1 2 "GTDB R11-RS232 statistics". Genome Taxonomy Database. Retrieved 17 August 2026.
  6. 1 2 "bac120_r232.sp_labels". Genome Taxonomy Database. Retrieved 17 August 2026.
  7. ↑ "bac120_taxonomy_r232.tsv". Genome Taxonomy Database. Retrieved 17 August 2026.
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