Name: Blastococcus saxobsidens Urzì et al. 2004

Category: Species

Proposed as: sp. nov.

Etymology: sax.ob’si.dens. L. neut. n. saxum, rock; L. pres. part. obsidens, staying, remaining, occupying; N.L. masc. part. adj. saxobsidens, rock-occupying

Gender: masculine

Type strain: BC 444; DSM 44509; JCM 13239; NRRL B-24246

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ296061 Analyse FASTA

Valid publication: Urzi C, Salamone P, Schumann P, Rohde M, Stackebrandt E. Blastococcus saxobsidens sp. nov., and emended descriptions of the genus Blastococcus Ahrens and Moll 1970 and Blastococcus aggregatus Ahrens and Moll 1970. Int J Syst Evol Microbiol 2004; 54:253-259.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 54, part 1 of the IJSEM. Int J Syst Evol Microbiol 2004; 54:633-634.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Hezbri et al. 2016 Hezbri K, Louati M, Nouioui I, Gtari M, Rohde M, Sproer C, Schumann P, Klenk HP, Ghodhbane-Gtari F, Montero-Calasanz MD. Blastococcus capsensis sp. nov., isolated from an archaeological Roman pool and emended description of the genus Blastococcus, B. aggregatus, B. saxobsidens, B. jejuensis and B. endophyticus. Int J Syst Evol Microbiol 2016; 66:4864-4872. Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 66, part 11 of the IJSEM. Int J Syst Evol Microbiol 2017; 67:179-182.
  • Montero-Calasanz et al. 2022 Montero-Calasanz MDC, Yaramis A, Rohde M, Schumann P, Klenk HP, Meier-Kolthoff JP. Genotype-phenotype correlations within the Geodermatophilaceae. Front Microbiol 2022; 13:975365. Oren A, Göker M. List of changes in taxonomic opinion no. 38. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2023; 73:5923.

• Notes:
  • 😢 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.
  • 🧬 The phylogenomic assignment score of this taxon is 0.06780 (N = 2).
  • 😷 The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — 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 14 times in PubMed until 2025-06-04.
  • 🧍 In the paper by Urzì et al. 2004, the 16S rRNA gene sequence of the type strain BC444 is given as AJ316571. According to the "NCBI Entrez Nucleotide", AJ316571 is the sequence of the strain BC448. The correct sequence number of the type strain BC444 should be AJ296061, but it is a short sequence (437 nucleotides). Publication: Euzeby JP. List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int J Syst Bacteriol 1997; 47:590-592.
  • 🧍 In the paper by Urzì et al. 2004, the strain NRRL B-24246 is erroneously cited as NRRL 24246. Publication: Urzi C, Salamone P, Schumann P, Rohde M, Stackebrandt E. Blastococcus saxobsidens sp. nov., and emended descriptions of the genus Blastococcus Ahrens and Moll 1970 and Blastococcus aggregatus Ahrens and Moll 1970. Int J Syst Evol Microbiol 2004; 54:253-259.

Parent taxon: Blastococcus Ahrens and Moll 1970 (Approved Lists 1980)

Assigned by: Urzi C, Salamone P, Schumann P, Rohde M, Stackebrandt E. Blastococcus saxobsidens sp. nov., and emended descriptions of the genus Blastococcus Ahrens and Moll 1970 and Blastococcus aggregatus Ahrens and Moll 1970. Int J Syst Evol Microbiol 2004; 54:253-259.

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Record number: 774088