Name: Ectothiorhodospiraceae Imhoff 1984

Category: Family

Proposed as: fam. nov.

Etymology: Ec.to.thi.o.rho.do.spi.ra’ce.ae. N.L. fem. n. Ectothiorhodospira, type genus of the family; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Ectothiorhodospiraceae, Ectothiorhodospira family

Pronunciation (Latin), gender: ek-to-t^hi-o-r^ho-do-spi-RA-ke-a͡e, feminine

Type genus: Ectothiorhodospira Pelsh 1936 (Approved Lists 1980)

Valid publication: Imhoff JF. Reassignment of the genus Ectothiorhodospira Pelsh 1936 to a new family, Ectothiorhodospiraceae fam. nov., and emended description of the Chromatiaceae Bavendamm 1924. Int. J. Syst. Bacteriol. 1984; 34:338-339. 🇩🇪

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    Oceanococcaceae Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    Nitrococcaceae Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    Thioalkalivibrionaceae Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    Methylohalomonadaceae Sorokin and Merkel 2023	heterotypic synonym, validly published under the ICNP
    Thiohalospiraceae Sorokin and Merkel 2023	heterotypic synonym, validly published under the ICNP
    Aquisalimonadaceae Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    Acidihalobacteraceae Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP
    Natronospiraceae Sorokin et al. 2025	heterotypic synonym, validly published under the ICNP
    Thiohalomonadaceae Sorokin and Merkel 2023	heterotypic synonym, validly published under the ICNP
    Halofilaceae Chuvochina et al. 2024	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Imhoff et al. 2022 Imhoff JF, Kyndt JA, Meyer TE. Genomic Comparison, Phylogeny and Taxonomic Reevaluation of the Ectothiorhodospiraceae and Description of Halorhodospiraceae fam. nov. and Halochlorospira gen. nov. Microorganisms 2022; 10:0. 🇺🇸 Oren A, Garrity GM. List of changes in taxonomic opinion no. 36. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2022; 72:5413.
    Notes:
    • ⊖ Emendation accompanied by the removal of 1 genus from the family.

• Notes:
  • 🧕 Chuvochina et al. (2023) assigned this family to the order Ectothiorhodospirales Chuvochina et al. 2024. Publication: Chuvochina M, Mussig AJ, Chaumeil PA, Skarshewski A, Rinke C, Parks DH, Hugenholtz P. Proposal of names for 329 higher rank taxa defined in the Genome Taxonomy Database under two prokaryotic codes. FEMS Microbiol Lett 2023; 0:0. 🇦🇺
  • 🧕 Imhoff et al. (2022) assigned this family to the class Gammaproteobacteria Garrity et al. 2005. Publication: Imhoff JF, Kyndt JA, Meyer TE. Genomic Comparison, Phylogeny and Taxonomic Reevaluation of the Ectothiorhodospiraceae and Description of Halorhodospiraceae fam. nov. and Halochlorospira gen. nov. Microorganisms 2022; 10:0. 🇺🇸
  • 🧒 Imhoff and Süling (1996) assigned the genus Halorhodospira Imhoff and Süling 1997 to this family. Publication: Imhoff JF, Suling J. The phylogenetic relationship among Ectothiorhodospiraceae: a reevaluation of their taxonomy on the basis of 16S rDNA analyses. Arch Microbiol 1996; 165:106-113. 🇩🇪
  • 🧒 Yilmaz et al. (2014) assigned the genus Acidiferrobacter Hallberg et al. 2011 to this family. Publication: Yilmaz P, Parfrey LW, Yarza P, Gerken J, Pruesse E, Quast C, Schweer T, Peplies J, Ludwig W, Glöckner FO. The SILVA and “all-species living tree project (LTP)” taxonomic frameworks. Nucleic Acids Research 2014; 42(D1):D643-D648. 🇩🇪
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Ectiothiorhodospiraceae"; "Ectothiorhedospiraceae"; "Ectothiorhodospiruceae"; "Ectothiorodhospiraceae"; "Ectothiorodospiraceae"; "Ectotlaiorhodosfraceae".
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Trüper HG, Imhoff JF. International Committee on Systematic Bacteriology - Subcommittee on the taxonomy of phototrophic bacteria. Minutes of the meetings, 10 September 1997, Vienna, Austria. Int. J. Syst. Bacteriol. 1999; 49:925-926. 🇩🇪
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Trueper HG, Imhoff JF. ICSB, SUBCOMMITTEE ON THE TAXONOMY OF THE PHOTOTROPHIC BACTERIA: Minutes of the meetings, 10 September 1997, Vienna, Austria. Int. J. Syst. Bacteriol. 1999; 49:925-926. 🇩🇪
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Madigan MT, Imhoff JF. International Committee on Systematics of Prokaryotes; Subcommittee on the taxonomy of phototrophic bacteria. International Journal of Systematic and Evolutionary Microbiology 2007; 57:1169-1171. 🇺🇸
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: Madigan MT, Imhoff JF. International Committee on Systematics of Prokaryotes: Subcommittee on the taxonomy of phototrophic bacteria. International Journal of Systematic and Evolutionary Microbiology 2007; 57:1169-1171. 🇺🇸
  • 🧔 This taxon was discussed in a meeting of a Taxonomic Subcommittee of the ICSP. Publication: J.f. Imhoff MTM. Erratum to “International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of phototrophic bacteria. Minutes of the meetings, 27 August 2003, Tokyo, Japan”. Int. J. Syst. Evol. Microbiol. 2004; 54:1907.
  • 💁 Taxonomists who have recently focused on this group are the corresponding authors of Leon et al. (2024). Editors in search of reviewers are advised to consider additional criteria such as whether a taxon is covered by one of the ICSP subcommittees.
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 54; UNIQEM: 17; JCM: 16; ATCC: 11; CECT: 10; NCCB: 9; LMG: 8; KCTC: 7; MCCC: 6; CCM: 5.

Subdivision:

Number of child taxa with a validly published and correct name: 23
Number of child taxa with a validly published name, including synonyms: 24
Total number of child taxa: 29

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Acidihalobacter Cárdenas et al. 2015	validly published under the ICNP	correct name
    Alcalilimnicola Yakimov et al. 2001	inaccurate spelling	misspelling
    Alkalilimnicola corrig. Yakimov et al. 2001	validly published under the ICNP	correct name
    Alkalispirillum Rijkenberg et al. 2025	validly published under the ICNP	correct name
    Aquisalimonas Márquez et al. 2007	validly published under the ICNP	correct name
    Arhodomonas Adkins et al. 1993	validly published under the ICNP	correct name
    Ectothiorhodosinus Gorlenko et al. 2007	validly published under the ICNP	correct name
    Ectothiorhodospira Pelsh 1936 (Approved Lists 1980)	validly published under the ICNP	correct name
    "Candidatus Endonucleariibacter" corrig. Dirren et al. 2014	not validly published	pro-correct name
    "Candidatus Endonucleariobacter" Dirren et al. 2014	inaccurate spelling	misspelling
    Halofilum Xia et al. 2017	validly published under the ICNP	correct name
    Halopeptonella Menes et al. 2016	validly published under the ICNP	synonym
    Inmirania Slobodkina et al. 2016	validly published under the ICNP	correct name
    "Maricoccus" Li et al. 2013	not validly published	synonym
    Methylohalomonas Sorokin et al. 2007	validly published under the ICNP	correct name
    Methylonatrum Sorokin et al. 2007	validly published under the ICNP	correct name
    Natronocella Sorokin et al. 2007	validly published under the ICNP	correct name
    Natronospira Sorokin et al. 2017	validly published under the ICNP	correct name
    Nitrococcus Watson and Waterbury 1971 (Approved Lists 1980)	validly published under the ICNP	correct name
    Oceanococcus Li et al. 2014	validly published under the ICNP	correct name
    Sediminicurvatus León et al. 2025	validly published under the ICNP	correct name
    Spiribacter León et al. 2014	validly published under the ICNP	correct name
    Thialkalivibrio Sorokin et al. 2001	inaccurate spelling	misspelling
    Thioalbus Park et al. 2011	validly published under the ICNP	correct name
    Thioalkalivibrio corrig. Sorokin et al. 2001	validly published under the ICNP	correct name
    Thiogranum Mori et al. 2015	validly published under the ICNP	correct name
    Thiohalomonas Sorokin et al. 2007	validly published under the ICNP	correct name
    Thiohalospira Sorokin et al. 2008	validly published under the ICNP	correct name
    Thiorhodospira Bryantseva et al. 1999	validly published under the ICNP	correct name

Parent taxon: Chromatiales Imhoff 2005

Assigned by: Imhoff JF. Order I. Chromatiales ord. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 1-3. 🇺🇸

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Record number: 469