Name: Quadrisphaera granulorum Maszenan et al. 2005

Category: Species

Proposed as: sp. nov.

Etymology: gra.nu.lo’rum. L. gen. neut. dim. pl. n. granulorum, from, or of, granules

Gender: feminine

Type strain: AG019; ATCC BAA-1104; DSM 44889; JCM 16010

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AY831385 Analyse FASTA

Valid publication: Maszenan AM, Tay JH, Schumann P, Jiang HL, Tay ST. Quadrisphaera granulorum gen. nov., sp. nov., a Gram-positive polyphosphate-accumulating coccus in tetrads or aggregates isolated from aerobic granules. Int J Syst Evol Microbiol 2005; 55:1771-1777. 🇸🇬

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 55, part 5 of the IJSEM. Int J Syst Evol Microbiol 2006; 56:7-9.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Nouioui et al. 2018 Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.

• Notes:
  • 🥇 Nomenclatural type of the genus Quadrisphaera Maszenan et al. 2005. Publication: Maszenan AM, Tay JH, Schumann P, Jiang HL, Tay ST. Quadrisphaera granulorum gen. nov., sp. nov., a Gram-positive polyphosphate-accumulating coccus in tetrads or aggregates isolated from aerobic granules. Int J Syst Evol Microbiol 2005; 55:1771-1777. 🇸🇬
  • 😷 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.

Parent taxon: Quadrisphaera Maszenan et al. 2005

Assigned by: Maszenan AM, Tay JH, Schumann P, Jiang HL, Tay ST. Quadrisphaera granulorum gen. nov., sp. nov., a Gram-positive polyphosphate-accumulating coccus in tetrads or aggregates isolated from aerobic granules. Int J Syst Evol Microbiol 2005; 55:1771-1777. 🇸🇬

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Record number: 780306