Species Ensifer americanus

Name: Ensifer americanus corrig. (Toledo et al. 2004) Wang et al. 2015

Category, proposed as: species, comb. nov.

Basonym: Sinorhizobium americanum corrig. Toledo et al. 2004

Etymology: a.me.ri.ca’nus. N.L. masc. adj. americanus, American, pertaining to the American continent

Pronunciation (Latin), gender: EN-si-fer a-me-ri-KA-nus, masculine

Type strain: ATCC BAA-532; CFNEI 156; CIP 108390; DSM 15007

Conduct genome-based taxonomy at

16S rRNA gene: AF506513 Analyse FASTA

Effective publication: Wang YC, Wang F, Hou BC, Wang ET, Chen WF, Sui XH, Chen WX, Li Y, Zhang YB. Proposal of Ensifer psoraleae sp. nov., Ensifer sesbaniae sp. nov., Ensifer morelense comb. nov. and Ensifer americanum comb. nov. Syst Appl Microbiol 2013; 36:467-473. 🇨🇳

IJSEM list: Oren A, Garrity GM. Validation list no. 162. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2015; 65:741-744.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Sinorhizobium americanum corrig. Toledo et al. 2004	homotypic synonym, validly published under the ICNP
    Ensifer americanum (Toledo et al. 2004) Wang et al. 2015	other spelling of name, inaccurate spelling
    Sinorhizobium americanus Toledo et al. 2004	homotypic synonym, inaccurate spelling

• 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. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 😷 The risk group for Germany has been imported on 2026-08-13. 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 0 times in PubMed until 2026-06-11.
  • 🧍 The original spelling of the specific epithet, americanus (sic), has been corrected on validation. Publication: Oren A, Garrity GM. Validation list no. 162. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2015; 65:741-744.

Parent taxon: Ensifer Casida 1982

Assigned by: Wang YC, Wang F, Hou BC, Wang ET, Chen WF, Sui XH, Chen WX, Li Y, Zhang YB. Proposal of Ensifer psoraleae sp. nov., Ensifer sesbaniae sp. nov., Ensifer morelense comb. nov. and Ensifer americanum comb. nov. Syst Appl Microbiol 2013; 36:467-473. 🇨🇳

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Record number: 792641