Name: Frankia inefficax Nouioui et al. 2017

Category: Species

Proposed as: sp. nov.

Etymology: in.ef’fi.cax. L. adj. inefficax, inefficient in reference to the inability of the bacterium to form effective nitrogen-fixing symbiosis with its plant host

Gender: feminine

Type strain: CECT 9037; DSM 45817; EuI1c

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: KX695197 Analyse FASTA

Effective publication: Nouioui I, Ghodhbane-Gtari F, Del Carmen Montero-Calasanz M, Rohde M, Tisa LS, Gtari M, Klenk HP. Frankia inefficax sp. nov., an actinobacterial endophyte inducing ineffective, non nitrogen-fixing, root nodules on its actinorhizal host plants. Antonie Van Leeuwenhoek 2017; 110:313-320.

IJSEM list: Oren A, Garrity GM. Validation list no. 175. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2017; 67:1095-1098.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Pseudofrankia inefficax (Nouioui et al. 2017) Gtari 2023	homotypic synonym, validly published under the ICNP

• Notes:
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 4 times in PubMed until 2024-03-27.

Parent taxon: Frankia Brunchorst 1886 (Approved Lists 1980)

Assigned by: Nouioui I, Ghodhbane-Gtari F, Del Carmen Montero-Calasanz M, Rohde M, Tisa LS, Gtari M, Klenk HP. Frankia inefficax sp. nov., an actinobacterial endophyte inducing ineffective, non nitrogen-fixing, root nodules on its actinorhizal host plants. Antonie Van Leeuwenhoek 2017; 110:313-320.

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Record number: 795353