Name: Rikenella microfusus (Kaneuchi and Mitsuoka 1978) Collins et al. 1985

Category: Species

Proposed as: comb. nov.

Basonym: Bacteroides microfusus Kaneuchi and Mitsuoka 1978 (Approved Lists 1980)

Etymology: mi.cro.fu.sus. Gr. masc. adj. mikros, small; L. masc. n. fusus, a spindle; N.L. masc. n. microfusus, a small spindle (referring to cellular morphology) (nominative in apposition)

Gender: feminine

Type strain: ATCC 29728; CCUG 54772; DSM 15922; JCM 2053; NCTC 11190

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB971798 Analyse FASTA

Effective publication: Collins MD, Shah HN, Mitsuoka T. Reclassification of Bacteroides microfusus (Kaneuchi and Mitsuoka) in a new genus Rikenella, as Rikenella microfusus comb. nov. Syst. Appl. Microbiol. 1985; 6:79-81.

IJSEM list: Anonymous. Validation list no. 18. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1985; 35:375-376.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Bacteroides microfusus Kaneuchi and Mitsuoka 1978 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Emendations:
  • Hahnke et al. 2016 Hahnke RL, Meier-Kolthoff JP, Garcia-Lopez M, Mukherjee S, Huntemann M, Ivanova NN, Woyke T, Kyrpides NC, Klenk HP, Goker M. Genome-Based Taxonomic Classification of Bacteroidetes. Front Microbiol 2016; 7:2003. Oren A, Garrity GM. List of changes in taxonomic opinion no. 26. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2017; 67:2081-2086.
    Notes:
    • The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project.

• Notes:
  • Nomenclatural type of the genus Rikenella Collins et al. 1985. Publication: Collins MD, Shah HN, Mitsuoka T. Reclassification of Bacteroides microfusus (Kaneuchi and Mitsuoka) in a new genus Rikenella, as Rikenella microfusus comb. nov. Syst. Appl. Microbiol. 1985; 6:79-81.

Parent taxon: Rikenella Collins et al. 1985

Assigned by: Collins MD, Shah HN, Mitsuoka T. Reclassification of Bacteroides microfusus (Kaneuchi and Mitsuoka) in a new genus Rikenella, as Rikenella microfusus comb. nov. Syst. Appl. Microbiol. 1985; 6:79-81.

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Record number: 780560