Name: Exiguobacterium aquaticum Raichand et al. 2012

Category: Species

Proposed as: sp. nov.

Etymology: a.qua’ti.cum. L. neut. adj. aquaticum, living in water, referring to the isolation of the type strain from water

Pronunciation, gender: a-KWA-ti-kum, neuter

Type strain: IMTB-3094; JCM 17977; MTCC 10958

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: JF775503 Analyse FASTA

Valid publication: Raichand R, Pareek S, Singh NK, Mayilraj S. Exiguobacterium aquaticum sp. nov., a member of the genus Exiguobacterium. Int J Syst Evol Microbiol 2012; 62:2150-2155. 🇮🇳

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 62, part 9 of the IJSEM. Int J Syst Evol Microbiol 2012; 62:2813-2814.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Exiguobacterium mexicanum López-Cortés et al. 2006

Risk group: 1

• Synonyms:

  • Name	Kind
    Exiguobacterium mexicanum López-Cortés et al. 2006	heterotypic synonym, validly published under the ICNP

• Notes:
  • ⏲ According to Wang et al. (2024), this species is a later heterotypic synonym of Exiguobacterium mexicanum López-Cortés et al. 2006. 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 terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. Contrasting the term "chemotaxonomic" with "phenotypic" is not recommended. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281. 🇬🇧
  • ❗ Exiguobacterium aquaticum 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 Exiguobacterium.
  • 😷 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 4 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of 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: Raichand R, Pareek S, Singh NK, Mayilraj S. Exiguobacterium aquaticum sp. nov., a member of the genus Exiguobacterium. Int J Syst Evol Microbiol 2012; 62:2150-2155. 🇮🇳

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Record number: 790131