Name: Breznakiellaceae Brune et al. 2022

Category: Family

Proposed as: fam. nov.

Etymology: Brez.na.ki.el.la’ce.ae. N.L. fem. dim. n. Breznakiella, type genus of the family; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Breznakiellaceae, the family Breznakiella

Pronunciation (Latin), gender: brez-na-ki-el-LA-ke-a͡e, feminine

Type genus: Breznakiella Song et al. 2022

Valid publication: Brune A, Song Y, Oren A, Paster BJ. A new family for 'termite gut treponemes': description of Breznakiellaceae fam. nov., Gracilinema caldarium gen. nov., comb. nov., Leadbettera azotonutricia gen. nov., comb. nov., Helmutkoenigia isoptericolens gen. nov., comb. nov., and Zuelzera stenostrepta gen. nov., comb. nov., and proposal of Rectinemataceae fam. nov. Int J Syst Evol Microbiol 2022; 72:5439. 🇺🇸

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 72, part 5 of the IJSEM. Int J Syst Evol Microbiol 2022; 72:5476.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Pillotinaceae" Margulis and Hinkle 1992	heterotypic synonym, not validly published

• Notes:
  • 🚃 The type genus of this family has alternatively been placed in the family "Termitinemataceae" Song et al. 2021. Publication: Song Y, Herve V, Radek R, Pfeiffer F, Zheng H, Brune A. Characterization and phylogenomic analysis of Breznakiella homolactica gen. nov. sp. nov. indicate that termite gut treponemes evolved from non-acetogenic spirochetes in cockroaches. Environ Microbiol 2021; 23:4228-4245. 🇩🇪
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. The phrase "validly described" is misleading. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281. 🇬🇧
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 5; JCM: 3; ATCC: 3; H: 1.
  • 🧍 As of 2022-06-02 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

Subdivision:

Number of child taxa with a validly published and correct name: 3
Number of child taxa with a validly published name, including synonyms: 7
Total number of child taxa: 9

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Breznakiella Song et al. 2022	validly published under the ICNP	correct name
    Gracilinema Brune et al. 2022	validly published under the ICNP	correct name
    Helmutkoenigia Brune et al. 2022	validly published under the ICNP	synonym
    Hollandina (ex To et al. 1978) Bermudes et al. 1988	validly published under the ICNP, illegitimate name	in need of a replacement
    "Candidatus Hollandinoides" Treitli et al. 2026	not validly published	preferred name
    Leadbettera Brune et al. 2022	validly published under the ICNP	synonym
    Pillotina (ex Hollande and Gharagozlou 1967) Bermudes et al. 1988	validly published under the ICNP	correct name
    "Candidatus Propulsinema" Fu et al. 2025	not validly published	preferred name
    Zuelzera Brune et al. 2022	validly published under the ICNP	synonym

Parent taxon: Spirochaetales Buchanan 1917 (Approved Lists 1980)

Assigned by: Brune A, Song Y, Oren A, Paster BJ. A new family for 'termite gut treponemes': description of Breznakiellaceae fam. nov., Gracilinema caldarium gen. nov., comb. nov., Leadbettera azotonutricia gen. nov., comb. nov., Helmutkoenigia isoptericolens gen. nov., comb. nov., and Zuelzera stenostrepta gen. nov., comb. nov., and proposal of Rectinemataceae fam. nov. Int J Syst Evol Microbiol 2022; 72:5439. 🇺🇸

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Record number: 28794