Name: Polynucleobacter necessarius Heckmann and Schmidt 1987

Category: Species

Proposed as: sp. nov.

Etymology: ne.ces.sa’ri.us. L. masc. adj. necessarius, indispensable, necessary

Pronunciation (Latin), gender: … ne-kes-SA-ri-us, masculine

Type strain: ATCC 30859; description (endosymbiont in stock 15 of Euplotes aediculatus, which is deposited at the ATCC); description [endosymbiont in stock 15 of Euplotes aediculatus, which is deposited at the ATCC (ATCC 30859)]

16S rRNA gene: AM397067 Analyse FASTA

Valid publication: Heckmann K, Schmidt HJ. Polynucleobacter necessarius gen. nov., sp. nov., an obligately endosymbiotic bacterium living in the cytoplasm of Euplotes aediculatus. Int. J. Syst. Bacteriol. 1987; 37:456-457.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Emendations:
  • Hahn et al. 2009 Hahn MW, Lang E, Brandt U, Wu QL, Scheuerl T. Emended description of the genus Polynucleobacter and the species Polynucleobacter necessarius and proposal of two subspecies, P. necessarius subsp. necessarius subsp. nov. and P. necessarius subsp. asymbioticus subsp. nov. Int J Syst Evol Microbiol 2009; 59:2002-2009. 🇦🇹 Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 59, part 8 of the IJSEM. Int J Syst Evol Microbiol 2009; 59:2649-2650.
  • Hahn et al. 2016 Hahn MW, Schmidt J, Pitt A, Taipale SJ, Lang E. Reclassification of four Polynucleobacter necessarius strains as representatives of Polynucleobacter asymbioticus comb. nov., Polynucleobacter duraquae sp. nov., Polynucleobacter yangtzensis sp. nov. and Polynucleobacter sinensis sp. nov., and emended description of Polynucleobacter necessarius. Int J Syst Evol Microbiol 2016; 66:2883-2892. 🇦🇹 Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 66, part 8 of the IJSEM. Int J Syst Evol Microbiol 2016; 66:4306-4309.

• Notes:
  • 🥇 Nomenclatural type of the genus Polynucleobacter Heckmann and Schmidt 1987. Publication: Heckmann K, Schmidt HJ. Polynucleobacter necessarius gen. nov., sp. nov., an obligately endosymbiotic bacterium living in the cytoplasm of Euplotes aediculatus. Int. J. Syst. Bacteriol. 1987; 37:456-457.
  • 😷 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 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 29 times in PubMed until 2025-06-04.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 2

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Polynucleobacter necessarius subsp. asymbioticus Hahn et al. 2009	validly published under the ICNP	synonym
    Polynucleobacter necessarius subsp. necessarius (Heckmann and Schmidt 1987) Hahn et al. 2009	validly published under the ICNP	synonym of its species

Parent taxon: Polynucleobacter Heckmann and Schmidt 1987

Assigned by: Heckmann K, Schmidt HJ. Polynucleobacter necessarius gen. nov., sp. nov., an obligately endosymbiotic bacterium living in the cytoplasm of Euplotes aediculatus. Int. J. Syst. Bacteriol. 1987; 37:456-457.

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Record number: 784659