Name: Exiguobacterium mexicanum López-Cortés et al. 2006

Category: Species

Proposed as: sp. nov.

Etymology: me.xi.ca’num. N.L. neut. adj. mexicanum, Mexican (from the location of the laboratory where isolation of the strain took place)

Gender: neuter

Type strain: 8N; CIP 108859; DSM 16483

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: KY471023 Analyse FASTA

Effective publication: Lopez-Cortes A, Schumann P, Pukall R, Stackebrandt E. Exiguobacterium mexicanum sp. nov. and Exiguobacterium artemiae sp. nov., isolated from the brine shrimp Artemia franciscana. Syst Appl Microbiol 2006; 29:183-190. 🇩🇪

IJSEM list: Euzeby JP. Validation list no. 110. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:1459-1460.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Synonyms:

  • Name	Kind
    Exiguobacterium aquaticum Raichand et al. 2012	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Wang et al. 2024 Wang S, Dhulappa A, Quadri SR, Jin P, Wang K, Qiao H, Narsing Rao MP. Reclassification of Some Exiguobacterium Species Based on Genome Analysis. Curr Microbiol 2024; 81:186. 🇨🇳 Oren A, Göker M. List of changes in taxonomic opinion no. 42. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2025; 75:6793.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • ⏰ According to Wang et al. (2024), this species is an earlier heterotypic synonym of Exiguobacterium aquaticum Raichand et al. 2012. Publication: Wang S, Dhulappa A, Quadri SR, Jin P, Wang K, Qiao H, Narsing Rao MP. Reclassification of Some Exiguobacterium Species Based on Genome Analysis. Curr Microbiol 2024; 81:186. 🇨🇳
  • 😷 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 17 times in PubMed until 2025-06-04.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.

Parent taxon: Exiguobacterium Collins et al. 1984

Assigned by: Lopez-Cortes A, Schumann P, Pukall R, Stackebrandt E. Exiguobacterium mexicanum sp. nov. and Exiguobacterium artemiae sp. nov., isolated from the brine shrimp Artemia franciscana. Syst Appl Microbiol 2006; 29:183-190. 🇩🇪

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Record number: 785248