Name: Endomicrobium proavitum Zheng et al. 2018

Category: Species

Proposed as: sp. nov.

Etymology: pro.a.vi’tum. L. neut. adj. proavitum, belonging to the ancestors, a species ancestral to the intracellular symbionts in the genus Endomicrobium [from proavus, ancestor]

Pronunciation, gender: pro-a-WI-tum, neuter

Type strain: DSM 29378; JCM 30189; Rsa215

Conduct genome-based taxonomy at

16S rRNA gene: CP009498 Analyse FASTA

Effective publication: Zheng H, Dietrich C, Radek R, Brune A. Endomicrobium proavitum, the first isolate of Endomicrobia class. nov. (phylum Elusimicrobia)--an ultramicrobacterium with an unusual cell cycle that fixes nitrogen with a Group IV nitrogenase. Environ Microbiol 2016; 18:191-204.

IJSEM list: Oren A, Garrity GM. Validation list no. 180. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2018; 68:693-694.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Notes:
  • 🥇 Nomenclatural type of the genus Endomicrobium Zheng et al. 2018. Publication: Zheng H, Dietrich C, Radek R, Brune A. Endomicrobium proavitum, the first isolate of Endomicrobia class. nov. (phylum Elusimicrobia)--an ultramicrobacterium with an unusual cell cycle that fixes nitrogen with a Group IV nitrogenase. Environ Microbiol 2016; 18:191-204.
  • 🎓 Name mentioned 4 times in PubMed until 2025-06-04.

Parent taxon: Endomicrobium Zheng et al. 2018

Assigned by: Zheng H, Dietrich C, Radek R, Brune A. Endomicrobium proavitum, the first isolate of Endomicrobia class. nov. (phylum Elusimicrobia)--an ultramicrobacterium with an unusual cell cycle that fixes nitrogen with a Group IV nitrogenase. Environ Microbiol 2016; 18:191-204.

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Record number: 794701