Reclassification of Paenibacillus thermophilus Zhou et al. 2013 as a later heterotypic synonym of Paenibacillus macerans (Schardinger 1905) Ash et al. 1994

Int J Syst Evol Microbiol. 2019 Feb;69(2):417-421. doi: 10.1099/ijsem.0.003160. Epub 2018 Dec 12.


The taxonomic status of Paenibacillus thermophilus was analyzed using genomic and phenotypic approaches. The results of RNA polymerase beta subunit gene sequence comparisons indicated that two type strains of P. thermophilus (DSM 24746T and JCM 17693T) and Paenibacillus macerans ATCC 8244T shared 100 % sequence similarity. By whole-genome sequence comparison, their average nucleotide identity values were over 99.3 %. Investigation of substrate utilization, enzyme activities and cellular fatty acid patterns displayed no striking differences between P. thermophilus JCM 17693T and P. macerans JCM 2500T. On the basis of these results, we propose that the name Paenibacillus thermophilus is a later heterotypic synonym of Paenibacillus macerans.

Keywords: Paenibacillus macerans; Paenibacillus thermophilus; genome analysis; heterotypic synonym; multilocus sequence analysis.

MeSH terms

  • Bacterial Typing Techniques
  • Base Composition
  • DNA, Bacterial / genetics
  • DNA-Directed RNA Polymerases / genetics
  • Paenibacillus / classification*
  • Phylogeny*
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA


  • DNA, Bacterial
  • RNA, Ribosomal, 16S
  • DNA-Directed RNA Polymerases
  • RNA polymerase beta subunit