Name: Silicibacter lacuscaerulensis Petursdottir and Kristjansson 1999

Category: Species

Proposed as: sp. nov.

Etymology: la.cus.cae.ru.len’sis. L. gen. masc. n. lacus, lake; L. masc. adj. caeruleus, blue; N.L. gen. masc. n. lacuscaerulensis, pertaining to the blue lake [probably better: lacuscaerulei]

Pronunciation, gender: la-kus-ka͡e-ru-LEN-sis, masculine

Type strain: DSM 11314; ITI-1157; KCTC 2953

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: U77644 Analyse FASTA

Effective publication: Petursdottir SK, Kristjansson JK. Silicibacter lacuscaerulensis gen. nov., sp. nov., a mesophilic moderately halophilic bacterium characteristic of the Blue Lagoon geothermal lake in Iceland. Extremophiles 1997; 1:94-99.

IJSEM list: Anonymous. Validation list no. 71. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1999; 49:1325-1326.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Ruegeria lacuscaerulensis (Petursdottir and Kristjansson 1999) Yi et al. 2007

Risk group: 1

• Synonyms:

  • Name	Kind
    Ruegeria lacuscaerulensis (Petursdottir and Kristjansson 1999) Yi et al. 2007	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Silicibacter Petursdottir and Kristjansson 1999. Publication: Petursdottir SK, Kristjansson JK. Silicibacter lacuscaerulensis gen. nov., sp. nov., a mesophilic moderately halophilic bacterium characteristic of the Blue Lagoon geothermal lake in Iceland. Extremophiles 1997; 1:94-99.
  • ❗ Silicibacter lacuscaerulensis 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 Silicibacter.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — 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.
  • 🧍 According to Muramatsu et al. 2007, 16S rRNA gene sequence analysis suggests that the genera Ruegeria and Silicibacter are closely related and should be integrated into one genus (i.e. Ruegeria Uchino et al. 1999 which has priority over Silicibacter Petursdottir and Kristjansson 1999). However, their differential phenotypic properties do not support this unification. Consequently the authors retain the two species of Silicibacter in their paper. Publication: Muramatsu Y, Uchino Y, Kasai H, Suzuki K, Nakagawa Y. Ruegeria mobilis sp. nov., a member of the Alphaproteobacteria isolated in Japan and Palau. Int J Syst Evol Microbiol 2007; 57:1304-1309.

Parent taxon: Silicibacter Petursdottir and Kristjansson 1999

Assigned by: Petursdottir SK, Kristjansson JK. Silicibacter lacuscaerulensis gen. nov., sp. nov., a mesophilic moderately halophilic bacterium characteristic of the Blue Lagoon geothermal lake in Iceland. Extremophiles 1997; 1:94-99.

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Record number: 786141