Name: Porphyrobacter cryptus da Costa et al. 2003

Category: Species

Proposed as: sp. nov.

Etymology: cryp’tus. N.L. masc. adj. cryptus, hidden, to indicate the cryptic relationship of this species to the closely related organisms; from Gr. masc. adj. kryptos, hidden

Pronunciation, gender: KRYP-tus, masculine

Type strain: ALC-2; ATCC BAA-386; DSM 12079

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF465834 Analyse FASTA

Valid publication: Rainey FA, Silva J, Nobre MF, Silva MT, da Costa MS. Porphyrobacter cryptus sp. nov., a novel slightly thermophilic, aerobic, bacteriochlorophyll a-containing species. Int J Syst Evol Microbiol 2003; 53:35-41.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 53, part 1 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:629-630.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Erythrobacter cryptus (da Costa et al. 2003) Xu et al. 2020

Risk group: 1

• Synonyms:

  • Name	Kind
    Erythrobacter cryptus (da Costa et al. 2003) Xu et al. 2020	homotypic synonym, validly published under the ICNP

• Emendations:
  • Hördt et al. 2020 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. Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.
    Notes:
    • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project.

• Notes:
  • ❗ Porphyrobacter cryptus 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 Porphyrobacter.
  • ✏ The authority of the taxon name (da Costa et al.) deliberately differs from the authors of the publication (Rainey et al.).
  • 😷 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 1 time in PubMed until 2025-06-04.
  • 🧍 Complete authorship reads: da Costa, Rainey and Nobre.

Parent taxon: Porphyrobacter Fuerst et al. 1993

Assigned by: Rainey FA, Silva J, Nobre MF, Silva MT, da Costa MS. Porphyrobacter cryptus sp. nov., a novel slightly thermophilic, aerobic, bacteriochlorophyll a-containing species. Int J Syst Evol Microbiol 2003; 53:35-41.

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Record number: 779755