Name: Blastomonas ursincola (Yurkov et al. 1997) Hiraishi et al. 2000

Category: Species

Proposed as: comb. nov.

Basonym: Erythromonas ursincola Yurkov et al. 1997

Etymology: urs.in’co.la. L. masc. n. ursus, bear; L. masc./fem. n. incola, inhabitant, dweller; N.L. masc./fem. n. ursincola, intended top mean neighbor or compatriot of bears

Pronunciation, gender: urs-IN-ko-la, feminine

Type strain: CIP 106843; DSM 9006; EY 4250; JCM 10397; JCM 13370; KR-99

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB024289 Analyse FASTA

Valid publication: Hiraishi A, Kuraishi H, Kawahara K. Emendation of the description of Blastomonas natatoria (Sly 1985) Sly and Cahill 1997 as an aerobic photosynthetic bacterium and reclassification of Erythromonas ursincola Yurkov et al. 1997 as Blastomonas ursincola comb. nov. Int J Syst Evol Microbiol 2000; 50:1113-1118.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 50, part 3 of the IJSEM. Int J Syst Evol Microbiol 2000; 50:1419-1420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Synonyms:

  • Name	Kind
    "Erythromicrobium ursincola" Yurkov et al. 1991	homotypic synonym, not validly published
    Erythromonas ursincola Yurkov et al. 1997	homotypic synonym, validly published under the ICNP
    Sphingomonas ursincola (Yurkov et al. 1997) Yabuuchi et al. 1999	homotypic synonym, validly published under the ICNP

• Notes:
  • 📧 The e-mail address of the corresponding author given in the effective publication is not functional any more.
  • 😢 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. Using the term "phylogenetic data" (or equivalent) for sequence data is not advocated. 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 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 6 times in PubMed until 2025-06-04.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded risk group of the genus.
  • 🧍 According to Hiraishi et al. 2000 [1], Erythromonas ursincola Yurkov et al. 1997 and Blastomonas natatoria (Sly 1985) Sly and Cahill 1997 emend. Hiraishi et al. 2000 may be classified as different species in a single genus. According to Rule 44, the generic name Blastomonas Sly and Cahill 1997 has priority. Publication: Hiraishi A, Kuraishi H, Kawahara K. Emendation of the description of Blastomonas natatoria (Sly 1985) Sly and Cahill 1997 as an aerobic photosynthetic bacterium and reclassification of Erythromonas ursincola Yurkov et al. 1997 as Blastomonas ursincola comb. nov. Int J Syst Evol Microbiol 2000; 50:1113-1118.
  • 🧍 "Phenotypic, chemotaxonomic and phylogenetic data" (i.e., phenotypic data including chemotaxonomic data, as well as sequence data) confirm that the genus Blastomonas is distinct from the genus Sphingomonas Yabuuchi et al. 1990 and other genera of the α-4 group of the α-Proteobacteria. These data turn down the proposal of Yabuuchi et al. 1999 [2, 3] for transfer of Erythromonas ursincola and Blastomonas natatoria to the genus Sphingomonas. Publication: Yabuuchi E, Kosako Y, Naka T, Suzuki S, Yano I. Proposal of Sphingomonas suberifaciens (van Bruggen, Jochimsen and Brown 1990) comb. nov., sphingomonas natatoria (Sly 1985) comb. nov., Sphingomonas ursincola (Yurkov et al. 1997) comb. nov., and emendation of the genus Sphingomonas. Microbiol Immunol 1999; 43:339-349.

Parent taxon: Blastomonas Sly and Cahill 1997

Assigned by: Hiraishi A, Kuraishi H, Kawahara K. Emendation of the description of Blastomonas natatoria (Sly 1985) Sly and Cahill 1997 as an aerobic photosynthetic bacterium and reclassification of Erythromonas ursincola Yurkov et al. 1997 as Blastomonas ursincola comb. nov. Int J Syst Evol Microbiol 2000; 50:1113-1118.

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Record number: 774092