Genus Leifsonia

Name: Leifsonia Evtushenko et al. 2000

Category: Genus

Proposed as: gen. nov.

Etymology: Leif.so’ni.a N.L. fem. n. Leifsonia, named after Einar Leifson, who isolated and described the first organism of this genus

Type species: Leifsonia aquatica (ex Leifson 1962) Evtushenko et al. 2000

Conduct genome-based taxonomy of genus at TYGS

Valid publication: Evtushenko LI, Dorofeeva LV, Subbotin SA, Cole JR, Tiedje JM. Leifsonia poae gen. nov., sp. nov., isolated from nematode galls on Poa annua, and reclassification of 'Corynebacterium aquaticum' Leifson 1962 as Leifsonia aquatica (ex Leifson 1962) gen. nov., nom. rev., comb. nov. and Clavibacter xyli Davis et al. 1984 with two subspecies as Leifsonia xyli (Davis et al. 1984) gen. nov., comb. nov. Int J Syst Evol Microbiol 2000; 50:371-380.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 50, part 1 of the IJSEM. Int J Syst Evol Microbiol 2000; 50:425-426.

Nomenclatural status: validly published

Taxonomic status: synonym

Correct name: "Leifsonia" Suzuki et al. 1999

Synonyms:

Name	Kind
"Leifsonia" Suzuki et al. 1999	homotypic synonym, not validly published

Emendations:
- Reddy et al. 2008 Reddy GS, Prabagaran SR, Shivaji S. Leifsonia pindariensis sp. nov., isolated from the Pindari glacier of the Indian Himalayas, and emended description of the genus Leifsonia. Int J Syst Evol Microbiol 2008; 58:2229-2234.
  Notes:
  - Emendation accompanied by the proposal of 1 new species in the genus.
- Dastager et al. 2009 Dastager SG, Lee JC, Ju YJ, Park DJ, Kim CJ. Leifsonia kribbensis sp. nov., isolated from soil. Int J Syst Evol Microbiol 2009; 59:18-21.
  Notes:
  - Emendation accompanied by the proposal of 1 new species in the genus.

Notes:
- The type species of this genus has alternatively been placed in the genus Corynebacterium Lehmann and Neumann 1896 (Approved Lists 1980). Publication: Leifson E. The bacterial flora of distilled and stored water. III. New species of the genera Corynebacterium, Flavobacterium, Spirillum and Pseudomonas. International Bulletin of Bacteriological Nomenclature and Taxonomy 1962; 12:161-170.
- However Leifsonia Suzuki et al. and Leifsonia aquatica (ex Leifson 1962) Suzuki et al. are not included [2] because these names have been already validly published in the January 2000 issue of the IJSEM [3]. Publication: Anonymous. Validation list no. 75. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2000; 50:1415-1417.
- In a paper published in the December 1999 issue of the Journal of General and Applied Microbiology, Suzuki et al. [1] proposed the genus Leifsonia Suzuki et al. (type species: Leifsonia aquatica), the species Leifsonia aquatica (ex Leifson 1962) Suzuki et al., Leifsonia naganoensis Suzuki et al., Leifsonia shinshuensis Suzuki et al., and the new combination Leifsonia cynodontis (Davis et al. 1984) Suzuki et al. Hereafter, the authors submit the new names and the new combination for valid publication by inscription in a validation list. The names Leifsonia naganoensis Suzuki et al. 2000, Leifsonia shinshuensis Suzuki et al. 2000, and Leifsonia cynodontis (Davis et al. 1984) Suzuki et al. 2000 are listed on the Validation List no. 75 (published in the July 2000 issue of the IJSEM). Publication: Suzuki KI, Suzuki M, Sasaki J, Park YH, Komagata KK. Leifsonia gen. nov., a genus for 2,4-diaminobutyric acid-containing actinomycetes to accommodate "Corynebacterium aquaticum" Leifson 1962 and Clavibacter xyli subsp. cynodontis Davis et al. 1984. J Gen Appl Microbiol 1999; 45:253-262.
- See also: Publication: Evtushenko LI, Dorofeeva LV, Subbotin SA, Cole JR, Tiedje JM. Leifsonia poae gen. nov., sp. nov., isolated from nematode galls on Poa annua, and reclassification of 'Corynebacterium aquaticum' Leifson 1962 as Leifsonia aquatica (ex Leifson 1962) gen. nov., nom. rev., comb. nov. and Clavibacter xyli Davis et al. 1984 with two subspecies as Leifsonia xyli (Davis et al. 1984) gen. nov., comb. nov. Int J Syst Evol Microbiol 2000; 50:371-380.
- The names Leifsonia naganoensis Suzuki et al. 2000, Leifsonia shinshuensis Suzuki et al. 2000, and Leifsonia cynodontis (Davis et al. 1984) Suzuki et al. 2000 are listed on the validation list n° 75 (published in the July 2000 issue of the IJSEM). However Leifsonia Suzuki et al. and Leifsonia aquatica (ex Leifson 1962) Suzuki et al. are not included [2] because these names have been already validly published in the January 2000 issue of the IJSEM [3]. Publication: Anonymous. Validation list no. 75. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2000; 50:1415-1417.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 17
Total number of child taxa: 19

Child taxa:

Name	Nomenclatural status	Taxonomic status
Leifsonia antarctica Pindi et al. 2009	validly published	orphaned species
"Leifsonia aquatica" (ex Leifson 1962) Suzuki et al. 1999	not validly published
Leifsonia aquatica (ex Leifson 1962) Evtushenko et al. 2000	validly published	orphaned species
Leifsonia aurea Reddy et al. 2003	validly published	synonym
Leifsonia bigeumensis Dastager et al. 2008	validly published	orphaned species
Leifsonia cynodontis (Davis et al. 1984) Suzuki et al. 2000	validly published	synonym
"Leifsonia flava" Cai et al. 2018	not validly published
Leifsonia ginsengi Qiu et al. 2007	validly published	synonym
Leifsonia kafniensis Pindi et al. 2009	validly published	orphaned species
Leifsonia kribbensis Dastager et al. 2009	validly published	synonym
Leifsonia lichenia An et al. 2010	validly published	orphaned species
Leifsonia naganoensis Suzuki et al. 2000	validly published	orphaned species
Leifsonia pindariensis Reddy et al. 2008	validly published	synonym
Leifsonia poae Evtushenko et al. 2000	validly published	orphaned species
Leifsonia psychrotolerans Ganzert et al. 2011	validly published	orphaned species
Leifsonia rubra Reddy et al. 2003	validly published	orphaned species
Leifsonia shinshuensis Suzuki et al. 2000	validly published	orphaned species
Leifsonia soli Madhaiyan et al. 2010	validly published	orphaned species
Leifsonia xyli (Davis et al. 1984) Evtushenko et al. 2000	validly published	orphaned species

Parent taxon: Microbacteriaceae Park et al. 1995

Assigned by: Zhi XY, Li WJ, Stackebrandt E. An update of the structure and 16S rRNA gene sequence-based definition of higher ranks of the class Actinobacteria, with the proposal of two new suborders and four new families and emended descriptions of the existing higher taxa. Int J Syst Evol Microbiol 2009; 59:589-608.

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