Name: Parvibacter caecicola Clavel et al. 2013

Category: Species

Proposed as: sp. nov.

Etymology: cae.ci’co.la. N.L. neut. n. caecum, caecum (from L. caecum intestinum caecum) (can be noun or adjective); L. masc./fem. n. suff. -cola, dweller, inhabitant; from L. masc./fem. n. incola, dweller; N.L. masc./fem. n. caecicola, caecum-dweller

Pronunciation (Latin), gender: … ka͡e-KI-ko-la, masculine

Type strain: CCUG 57646; DSM 22242; NR06

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: GQ456228 Analyse FASTA

Valid publication: Clavel T, Charrier C, Wenning M, Haller D. Parvibacter caecicola gen. nov., sp. nov., a bacterium of the family Coriobacteriaceae isolated from the caecum of a mouse. Int J Syst Evol Microbiol 2013; 63:2642-2648. 🇩🇪

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 63, part 7 of the IJSEM. Int J Syst Evol Microbiol 2013; 63:3549-3550.

Nomenclatural status: validly published under the ICNP

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

Correct name: Adlercreutzia caecicola (Clavel et al. 2013) Nouioui et al. 2018

Risk group: 1

• Synonyms:

  • Name	Kind
    Adlercreutzia caecicola (Clavel et al. 2013) Nouioui et al. 2018	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Parvibacter Clavel et al. 2013. Publication: Clavel T, Charrier C, Wenning M, Haller D. Parvibacter caecicola gen. nov., sp. nov., a bacterium of the family Coriobacteriaceae isolated from the caecum of a mouse. Int J Syst Evol Microbiol 2013; 63:2642-2648. 🇩🇪
  • ❗ Parvibacter caecicola 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 Parvibacter.
  • 😷 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.
  • 🙅 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 pathogenicity of the species itself.
  • 🧍 The study by Stoll et al. (2021) claims that Parvibacter caecicola is the correct name of Adlercreutzia caecicola. However, the argumentation used in the publication suggests a misinterpretation of the International Code of Nomenclature of Prokaryotes (ICNP). If Adlercreutzia caecicola is assigned to the genus Adlercreutzia and not treated a as a later heterotypic synonym of another species in that genus, Adlercreutzia caecicola is the correct name of the species. Stoll et al. (2021) probably mean that the species should better be assigned to the genus Parvibacter, in which case the correct name would indeed by Parvibacter caecicola. The ICNP defined the term "correct name" but it is neutral regarding taxonomy. Moreover, the only phylogenetic analysis with support values shown in Stoll et al. (2021) displays Adlercreutzia caecicola as sister group of the other Adlercreutzia species and does not argue for a separate genus (Fig. 2). The argumentation of Nouioui et al. (2018) was not based on any of the other genomic criteria employed by Stoll et al. (2021) for separating the two genera anyway. Accordingly, the conclusion by Nouioui et al. (2018) cannot be attributed to the lack of the type-strain genome sequence of Adlercreutzia caecicola from their analyses. Publication: Stoll DA, Danylec N, Grimmler C, Kulling SE, Huch M. Genome analysis reveals that the correct name of type strain Adlercreutzia caecicola DSM 22242^T is Parvibacter caecicola Clavel et al. 2013. Int J Syst Evol Microbiol 2021; 71:4814. 🇩🇪

Parent taxon: Parvibacter Clavel et al. 2013

Assigned by: Clavel T, Charrier C, Wenning M, Haller D. Parvibacter caecicola gen. nov., sp. nov., a bacterium of the family Coriobacteriaceae isolated from the caecum of a mouse. Int J Syst Evol Microbiol 2013; 63:2642-2648. 🇩🇪

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Record number: 790938