Name: Sphaerochaeta Ritalahti et al. 2012

Category: Genus

Proposed as: gen. nov.

Etymology: Sphae.ro.chae’ta. Gr. fem. n. sphaîra, a sphere; Gr. fem. n. chaitê; N.L. fem. n. Sphaerochaeta, round cells along threads of hair, indicative of a round morphology with a derivation from spirochaetal ancestry

Gender, pronunciation: feminine (stem: Sphaerochaet-), sp^ha͡e-ro-K^HA͡E-ta

Type species: Sphaerochaeta globosa Ritalahti et al. 2012

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Valid publication: Ritalahti KM, Justicia-Leon SD, Cusick KD, Ramos-Hernandez N, Rubin M, Dornbush J, Loffler FE. Sphaerochaeta globosa gen. nov., sp. nov. and Sphaerochaeta pleomorpha sp. nov., free-living, spherical spirochaetes. Int J Syst Evol Microbiol 2012; 62:210-216.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 62, part 1 of the IJSEM. Int J Syst Evol Microbiol 2012; 62:757-758.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    Parasphaerochaeta Bidzhieva et al. 2020	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Abt et al. 2012 Abt B, Han C, Scheuner C, Lu M, Lapidus A, Nolan M, Lucas S, Hammon N, Deshpande S, Cheng JF, et al. Complete genome sequence of the termite hindgut bacterium Spirochaeta coccoides type strain (SPN1^T), reclassification in the genus Sphaerochaeta as Sphaerochaeta coccoides comb. nov. and emendations of the family Spirochaetaceae and the genus Sphaerochaeta. Stand Genomic Sci 2012; 6:194-209. Euzeby JP. List of changes in taxonomic opinion no. 17. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2013; 63:8-9.
    Notes:
    • ⊕ Emendation accompanied by the proposal of 1 new species in the genus.
    • 🧍 Complete authorship reads: Abt, Göker, Kyrpides and Klenk.
  • Miyazaki et al. 2014 Miyazaki M, Sakai S, Ritalahti KM, Saito Y, Yamanaka Y, Saito Y, Tame A, Uematsu K, Loffler FE, Takai K, et al. Sphaerochaeta multiformis sp. nov., an anaerobic, psychrophilic bacterium isolated from subseafloor sediment, and emended description of the genus Sphaerochaeta. Int J Syst Evol Microbiol 2014; 64:4147-4154. Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 64, part 12 of the IJSEM. Int J Syst Evol Microbiol 2015; 65:739-740.
    Notes:
    • ⊕ Emendation accompanied by the proposal of 1 new species in the genus.
  • Arroua et al. 2017 Arroua B, Ranchou-Peyruse A, Ranchou-Peyruse M, Magot M, Urios L, Grimaud R. Pleomorphochaeta caudata gen. nov., sp. nov., an anaerobic bacterium isolated from an offshore oil well, reclassification of Sphaerochaeta multiformis MO-SPC2T as Pleomorphochaeta multiformis MO-SPC2T comb. nov. as the type strain of this novel genus and emended description of the genus Sphaerochaeta. Int J Syst Evol Microbiol 2017; 67:417-424. Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 67, part 2 of the IJSEM. Int J Syst Evol Microbiol 2017; 67:1099-1101.
    Notes:
    • ⊖ Emendation accompanied by the removal of 1 species from the genus.
  • Bidzhieva et al. 2020 Bidzhieva SK, Sokolova DS, Grouzdev DS, Kostrikina NA, Poltaraus AB, Tourova TP, Shcherbakova VA, Troshina OY, Nazina TN. Sphaerochaeta halotolerans sp. nov., a novel spherical halotolerant spirochete from a Russian heavy oil reservoir, emended description of the genus Sphaerochaeta, reclassification of Sphaerochaeta coccoides to a new genus Parasphaerochaeta gen. nov. as Parasphaerochaeta coccoides comb. nov. and proposal of Sphaerochaetaceae fam. nov. Int J Syst Evol Microbiol 2020; 70:4748-4759. Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 70, part 8 of the IJSEM. Int J Syst Evol Microbiol 2020; 70:5602-5608.
    Notes:
    • ⊖ Emendation accompanied by the removal of 1 species from the genus.
    • ⊕ Emendation accompanied by the proposal of 1 new species in the genus.

• Notes:
  • 🥇 Nomenclatural type of the family Sphaerochaetaceae Bidzhieva et al. 2020. Publication: Bidzhieva SK, Sokolova DS, Grouzdev DS, Kostrikina NA, Poltaraus AB, Tourova TP, Shcherbakova VA, Troshina OY, Nazina TN. Sphaerochaeta halotolerans sp. nov., a novel spherical halotolerant spirochete from a Russian heavy oil reservoir, emended description of the genus Sphaerochaeta, reclassification of Sphaerochaeta coccoides to a new genus Parasphaerochaeta gen. nov. as Parasphaerochaeta coccoides comb. nov. and proposal of Sphaerochaetaceae fam. nov. Int J Syst Evol Microbiol 2020; 70:4748-4759.
  • 🥇 Nomenclatural type of the family Sphaerochaetaceae Hördt et al. 2020. Publication: Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468.
  • 🥇 Nomenclatural type of the order Sphaerochaetales 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.
  • 🧕 Chuvochina et al. (2023) assigned this genus to the order Sphaerochaetales 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.
  • 🧕 Gupta et al. (2013) assigned this genus to the family Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980). Publication: Gupta RS, Mahmood S, Adeolu M. A phylogenomic and molecular signature based approach for characterization of the phylum Spirochaetes and its major clades: proposal for a taxonomic revision of the phylum. Front Microbiol 2013; 4:217.
  • 🧕 Ritalahti et al. (2012) assigned this genus to the family Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980). Publication: Ritalahti KM, Justicia-Leon SD, Cusick KD, Ramos-Hernandez N, Rubin M, Dornbush J, Loffler FE. Sphaerochaeta globosa gen. nov., sp. nov. and Sphaerochaeta pleomorpha sp. nov., free-living, spherical spirochaetes. Int J Syst Evol Microbiol 2012; 62:210-216.
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 5; ATCC: 3; VKM: 3; KCTC: 2; JCM: 1.

Subdivision:

Number of child taxa with a validly published and correct name: 5
Number of child taxa with a validly published name, including synonyms: 6
Total number of child taxa: 7

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Sphaerochaeta associata Troshina et al. 2015	validly published under the ICNP	correct name
    Sphaerochaeta coccoides (Dröge et al. 2006) Abt et al. 2012	validly published under the ICNP	correct name
    Sphaerochaeta globosa Ritalahti et al. 2012	validly published under the ICNP	correct name
    "Sphaerochaeta halotolerans" Grouzdev et al. 2018	not validly published	synonym
    Sphaerochaeta halotolerans Bidzhieva et al. 2020	validly published under the ICNP	correct name
    Sphaerochaeta multiformis Miyazaki et al. 2014	validly published under the ICNP	synonym
    Sphaerochaeta pleomorpha Ritalahti et al. 2012	validly published under the ICNP	correct name

Parent taxon: Sphaerochaetaceae Hördt et al. 2020

Assigned by: Bidzhieva SK, Sokolova DS, Grouzdev DS, Kostrikina NA, Poltaraus AB, Tourova TP, Shcherbakova VA, Troshina OY, Nazina TN. Sphaerochaeta halotolerans sp. nov., a novel spherical halotolerant spirochete from a Russian heavy oil reservoir, emended description of the genus Sphaerochaeta, reclassification of Sphaerochaeta coccoides to a new genus Parasphaerochaeta gen. nov. as Parasphaerochaeta coccoides comb. nov. and proposal of Sphaerochaetaceae fam. nov. Int J Syst Evol Microbiol 2020; 70:4748-4759.

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Record number: 518162