Name: "Candidatus Paracaedibacteraceae" Hess et al. 2016

Category: Family

Proposed as: Candidatus

Etymology: Pa.ra.cae.di.bac.te.ra’ce.ae. N.L. fem. pl. n. Paracaedibacteraceae, derives from the name of the included candidate genus “Ca. Paracaedibacter”; L. fem. pl. n. suff. -aceae, ending to denote a family

Pronunciation (Latin), gender: pa-ra-ka͡e-di-bak-te-RA-ke-a͡e, feminine

Type genus: "Candidatus Paracaedibacter" Horn et al. 1999

Effective publication: Hess S, Suthaus A, Melkonian M. "Candidatus Finniella" (Rickettsiales, Alphaproteobacteria), Novel Endosymbionts of Viridiraptorid Amoeboflagellates (Cercozoa, Rhizaria). Appl Environ Microbiol 2016; 82:659-670. 🇩🇪

IJSEM list: Oren A, Garrity GM, Parker CT, Chuvochina M, Trujillo ME. Candidatus list no. 1. Lists of names of prokaryotic Candidatus taxa. Int J Syst Evol Microbiol 2020; 70:3956-4042.

Nomenclatural status: not validly published

Nomenclatural pro-status: pro-validly published under the ICNP

Taxonomic status: pro-correct name

• Notes:
  • 🧕 Castelli and Petroni (2025) assigned this family to the suborder Holosporineae (Szokoli et al. 2020) Castelli and Petroni 2025. Publication: Castelli M, Petroni G. An Evolutionary-Focused Review of the Holosporales (Alphaproteobacteria): Diversity, Host Interactions, and Taxonomic Re-ranking as Holosporineae Subord. Nov. Microb Ecol 2025; 88:15. 🇮🇹
  • 🧕 Chuvochina et al. (2023) assigned this family to the order "Candidatus Paracaedibacterales" Chuvochina et al. 2023. 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. 🇦🇺
  • 🧕 Hess et al. (2016) assigned this family to the order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980). Publication: Hess S, Suthaus A, Melkonian M. "Candidatus Finniella" (Rickettsiales, Alphaproteobacteria), Novel Endosymbionts of Viridiraptorid Amoeboflagellates (Cercozoa, Rhizaria). Appl Environ Microbiol 2016; 82:659-670. 🇩🇪
  • 🚃 The type genus of this family has alternatively been placed in the family Holosporaceae Görtz and Schmidt 2006. Publication: Görtz HD, Schmidt HJ. Family III. Holosporaceae fam. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria), Springer, New York, 2005, p. 146-149. 🇺🇸
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Paracedibacteraceae".

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 0
Total number of child taxa: 9

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Candidatus Bodocaedibacter" Midha et al. 2021	inaccurate spelling	misspelling
    "Candidatus Bodonicaedibacter" corrig. Midha et al. 2021	not validly published	pro-correct name
    "Candidatus Captivus" Baker et al. 2003	not validly published	pro-correct name
    "Candidatus Finniella" Hess et al. 2016	not validly published	pro-correct name
    "Candidatus Intestinibacterium" corrig. Dirren and Posch 2016	not validly published	pro-correct name
    "Candidatus Intestinusbacter" Dirren and Posch 2016	inaccurate spelling	misspelling
    "Candidatus Odyssella" Birtles et al. 2000	not validly published	pro-correct name
    "Candidatus Paracaedibacter" Horn et al. 1999	not validly published	pro-correct name
    "Candidatus Parafinniella" Boscaro et al. 2019	not validly published	pro-correct name

Parent taxon: Holosporales Szokoli et al. 2020

Assigned by: Szokoli F, Castelli M, Sabaneyeva E, Schrallhammer M, Krenek S, Doak TG, Berendonk TU, Petroni G. Disentangling the Taxonomy of Rickettsiales and Description of Two Novel Symbionts ("Candidatus Bealeia paramacronuclearis" and "Candidatus Fokinia cryptica") Sharing the Cytoplasm of the Ciliate Protist Paramecium biaurelia. Appl Environ Microbiol 2016; 82:7236-7247. 🇮🇹

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Record number: 220