Name: Labrenzia alexandrii Biebl et al. 2007

Category: Species

Proposed as: sp. nov.

Etymology: a.le.xan’dri.i. N.L. gen. neut. n. alexandrii, of Alexandrium, the genus name of the dinoflagellate Alexandrium lusitanicum, the source of isolation of the type strain

Gender: feminine

Type strain: DFL-11; DSM 17067; NCIMB 14079

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ582083 Analyse FASTA

Valid publication: Biebl H, Pukall R, Lunsdorf H, Schulz S, Allgaier M, Tindall BJ, Wagner-Dobler I. Description of Labrenzia alexandrii gen. nov., sp. nov., a novel alphaproteobacterium containing bacteriochlorophyll a, and a proposal for reclassification of Stappia aggregata as Labrenzia aggregata comb. nov., of Stappia marina as Labrenzia marina comb. nov. and of Stappia alba as Labrenzia alba comb. nov., and emended descriptions of the genera Pannonibacter, Stappia and Roseibium, and of the species Roseibium denhamense and Roseibium hamelinense. Int J Syst Evol Microbiol 2007; 57:1095-1107.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 57, part 5 of the IJSEM. Int J Syst Evol Microbiol 2007; 57:1675-1676.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Roseibium alexandrii (Biebl et al. 2007) Hördt et al. 2020

Risk group: 1

• Synonyms:

  • Name	Kind
    Roseibium alexandrii (Biebl et al. 2007) Hördt et al. 2020	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Labrenzia Biebl et al. 2007. Publication: Biebl H, Pukall R, Lunsdorf H, Schulz S, Allgaier M, Tindall BJ, Wagner-Dobler I. Description of Labrenzia alexandrii gen. nov., sp. nov., a novel alphaproteobacterium containing bacteriochlorophyll a, and a proposal for reclassification of Stappia aggregata as Labrenzia aggregata comb. nov., of Stappia marina as Labrenzia marina comb. nov. and of Stappia alba as Labrenzia alba comb. nov., and emended descriptions of the genera Pannonibacter, Stappia and Roseibium, and of the species Roseibium denhamense and Roseibium hamelinense. Int J Syst Evol Microbiol 2007; 57:1095-1107.
  • ❗ Labrenzia alexandrii 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 Labrenzia.
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 3 times in PubMed until 2024-03-28.
  • 🧍 The genome of the type strain was sequenced by Fiebig et al. (2013). Publication: Fiebig A, Pradella S, Petersen J, Pauker O, Michael V, Lunsdorf H, Goker M, Klenk HP, Wagner-Dobler I. Genome of the R-body producing marine alphaproteobacterium Labrenzia alexandrii type strain (DFL-11^T). Stand Genomic Sci 2013; 7:413-426.
  • 🧍 The phylogenetic position of this species was determined in a genome-scale analysis by Hördt et al. (2020). Publication: Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468.

Parent taxon: Labrenzia Biebl et al. 2007

Assigned by: Biebl H, Pukall R, Lunsdorf H, Schulz S, Allgaier M, Tindall BJ, Wagner-Dobler I. Description of Labrenzia alexandrii gen. nov., sp. nov., a novel alphaproteobacterium containing bacteriochlorophyll a, and a proposal for reclassification of Stappia aggregata as Labrenzia aggregata comb. nov., of Stappia marina as Labrenzia marina comb. nov. and of Stappia alba as Labrenzia alba comb. nov., and emended descriptions of the genera Pannonibacter, Stappia and Roseibium, and of the species Roseibium denhamense and Roseibium hamelinense. Int J Syst Evol Microbiol 2007; 57:1095-1107.

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Record number: 781234