Name: Zavarzinia compransoris (ex Nozhevnikova and Zavarzin 1974) Meyer et al. 1994

Category: Species

Proposed as: sp. nov., nom. rev.

Etymology: com.pran.so’ris. L. masc. n. compransor (gen. compransoris), a companion in a banquet, a boon companion; L. gen. masc. n. compransoris, of a dinner companion

Pronunciation (Latin), gender: … kom-pran-SO-ris, feminine

Type strain: ATCC 51430; CCUG 15334; DSM 1231; LMG 5821; LMG 8357; Z-1155

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: JX986958 Analyse FASTA

Effective publication: Meyer O, Stackebrandt E, Auling G. Reclassification of ubiquinone Q-10 containing carbooxidotrophic bacteria: transfer of "[Pseudomonas] carboxydovorans" OM5 to Oligotropha, gen. nov., as Oligotropha carboxidovorans, comb. nov., transfer of "[Alcaligenes] carboxydus" DSM 1086 to Carbophilus, gen. nov., as Carbophilus carboxidus, comb. nov., transfer of "[Pseudomonas] compransoris" DSM 1231 to Zavarzinia, gen. nov., as Zavarzinia compransoris, comb. nov., amended description of the new genera. Syst. Appl. Microbiol. 1993; 16:390-395. 🇩🇪

IJSEM list: Anonymous. Validation list no. 48. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1994; 44:182-183.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Hördt et al. 2020 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. 🇩🇪
    Notes:
    • 🧍 As of 2020-04-15 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

• Notes:
  • 🥇 Nomenclatural type of the genus Zavarzinia Meyer et al. 1994. Publication: Meyer O, Stackebrandt E, Auling G. Reclassification of ubiquinone Q-10 containing carbooxidotrophic bacteria: transfer of "[Pseudomonas] carboxydovorans" OM5 to Oligotropha, gen. nov., as Oligotropha carboxidovorans, comb. nov., transfer of "[Alcaligenes] carboxydus" DSM 1086 to Carbophilus, gen. nov., as Carbophilus carboxidus, comb. nov., transfer of "[Pseudomonas] compransoris" DSM 1231 to Zavarzinia, gen. nov., as Zavarzinia compransoris, comb. nov., amended description of the new genera. Syst. Appl. Microbiol. 1993; 16:390-395. 🇩🇪
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 2 times in PubMed until 2025-06-04.
  • 🧍 Yarza et al. (2013) expected for accession JX986958, originating from the alleged type-strain deposit LMG 5821, an affiliation with Acetobacteraceae (Alphaproteobacteria) but observed an affiliation with a deep branch in Alphaproteobacteria and 90.9% similarity against Oceanibaculum indicum; 86.8% against Acetobacter aceti. Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73. 🇩🇪
  • 🧍 In Validation List no. 48, Zavarzinia compransoris is erroneously proposed as a new combination, basonym: "Pseudomonas compransoris" (Nozhevnikova and Zavarzin 1974) Cypionka et al. 1980. Publication: Euzeby JP, Kudo T. Corrigenda to the validation lists. Int J Syst Evol Microbiol 2001; 51:1933-1938. 🇫🇷
  • 🧍 In Validation List no. 48, Zavarzinia compransoris is erroneously proposed as a new combination [basonym: "Pseudomonas compransoris" (Nozhevnikova and Zavarzin 1974) Cypionka et al. 1980]. — 🧍 Nom. rev. / basonym "Pseudomonas compransoris". Publication: Migula W. Über ein neues System der Bakterien. Arbeiten aus dem Bakteriologischen Institut der Technischen Hochschule zu Karlsruhe 1894; 1:235-238.

Parent taxon: Zavarzinia Meyer et al. 1994

Assigned by: Meyer O, Stackebrandt E, Auling G. Reclassification of ubiquinone Q-10 containing carbooxidotrophic bacteria: transfer of "[Pseudomonas] carboxydovorans" OM5 to Oligotropha, gen. nov., as Oligotropha carboxidovorans, comb. nov., transfer of "[Alcaligenes] carboxydus" DSM 1086 to Carbophilus, gen. nov., as Carbophilus carboxidus, comb. nov., transfer of "[Pseudomonas] compransoris" DSM 1231 to Zavarzinia, gen. nov., as Zavarzinia compransoris, comb. nov., amended description of the new genera. Syst. Appl. Microbiol. 1993; 16:390-395. 🇩🇪

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Record number: 783206