Name: Sinorhizobium morelense Wang et al. 2002

Category: Species

Proposed as: sp. nov.

Etymology: mo.re.len’se. N.L. neut. adj. morelense, pertaining to Morelos, the name of a state in Mexico, where the bacterium was isolated

Pronunciation (Latin), gender: … mo-re-LEN-se, neuter

Type strain: CFN E1007; DSM 18131; Lc04; LMG 21331; NBRC 100387

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AY024335 Analyse FASTA

Valid publication: Wang ET, Tan ZY, Willems A, Fernandez-Lopez M, Reinhold-Hurek B, Martinez-Romero E. Sinorhizobium morelense sp. nov., a Leucaena leucocephala-associated bacterium that is highly resistant to multiple antibiotics. Int J Syst Evol Microbiol 2002; 52:1687-1693. 🇲🇽

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 52, part 5 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:3-5.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Ensifer morelensis corrig. (Wang et al. 2002) Wang et al. 2015

Risk group: 1

• Synonyms:

  • Name	Kind
    Ensifer morelensis corrig. (Wang et al. 2002) Wang et al. 2015	homotypic synonym, validly published under the ICNP
    Ensifer morelense (Wang et al. 2002) Wang et al. 2015	homotypic synonym, inaccurate spelling

• Notes:
  • ⏲ According to Wang et al. (2013), this species is not a later heterotypic synonym of "Sinorhizobium adhaerens" (Casida 1982) Willems et al. 2003. 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. 🇨🇳
  • ⏲ According to Wang et al. (2013), this species is not a later heterotypic synonym of Ensifer adhaerens Casida 1982. 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. 🇨🇳
  • ⏲ According to Young (2003), this species is a later heterotypic synonym of "Sinorhizobium adhaerens" (Casida 1982) Willems et al. 2003. Publication: Young JM. The genus name Ensifer Casida 1982 takes priority over Sinorhizobium Chen et al. 1988, and Sinorhizobium morelense Wang et al. 2002 is a later synonym of Ensifer adhaerens Casida 1982. Is the combination "Sinorhizobium adhaerens" (Casida 1982) Willems et al. 2003 legitimate? Request for an Opinion. Int J Syst Evol Microbiol 2003; 53:2107-2110. 🇳🇿
  • ⏲ According to Young (2003), this species is a later heterotypic synonym of Ensifer adhaerens Casida 1982. Publication: Young JM. The genus name Ensifer Casida 1982 takes priority over Sinorhizobium Chen et al. 1988, and Sinorhizobium morelense Wang et al. 2002 is a later synonym of Ensifer adhaerens Casida 1982. Is the combination "Sinorhizobium adhaerens" (Casida 1982) Willems et al. 2003 legitimate? Request for an Opinion. Int J Syst Evol Microbiol 2003; 53:2107-2110. 🇳🇿
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. 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.
  • ❗ Sinorhizobium morelense is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Sinorhizobium.
  • 😷 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 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 7 times in PubMed until 2025-06-04.
  • 🧍 According to Rules 27(3) and 30, this name is not validly published, because the original publication makes reference to the deposit of the type strain in a single recognized culture collection. However, according to the Judicial Opinion 81, Sinorhizobium morelense Wang et al. 2002 is considered to be validly published, since deposit in a second culture collection in a different country has been documented. Publication: Euzeby JP, Tindall BJ. Status of strains that contravene Rules 27(3) and 30 of the Bacteriological Code. Request for an opinion. Int J Syst Evol Microbiol 2004; 54:293-301. 🇫🇷

Parent taxon: Sinorhizobium Chen et al. 1988

Assigned by: Wang ET, Tan ZY, Willems A, Fernandez-Lopez M, Reinhold-Hurek B, Martinez-Romero E. Sinorhizobium morelense sp. nov., a Leucaena leucocephala-associated bacterium that is highly resistant to multiple antibiotics. Int J Syst Evol Microbiol 2002; 52:1687-1693. 🇲🇽

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Record number: 780941