RT Journal Article SR Electronic(1) A1 Yoon, J H A1 Park, Y HYR 2000 T1 Phylogenetic analysis of the genus Thermoactinomyces based on 16S rDNA sequences. JF International Journal of Systematic and Evolutionary Microbiology, VO 50 IS 3 SP 1081 OP 1086 DO https://doi.org/10.1099/00207713-50-3-1081 PB Microbiology Society, SN 1466-5034, AB The almost complete 16S rDNA sequences of the type strains of eight validly described species and two invalid species of the genus Thermoactinomyces were determined and phylogenetically analysed. The validly described Thermoactinomyces species formed phylogenetic lineages related to the family Bacillaceae, as shown previously. However, the available strains of 'Thermoactinomyces glaucus' and 'Thermoactinomyces monosporus' exhibited their closest phylogenetic affinities not to the genus Thermoactinomyces but to the genus Saccharomonospora. Some Thermoactinomyces species were shown to be closely related from 16S rDNA sequence analysis. Particularly, Thermoactinomyces vulgaris KCTC 9076T and Thermoactinomyces candidus KCTC 9557T had the same 16S rDNA sequences and Thermoactinomyces thalpophilus KCTC 9789T and Thermoactinomyces sacchari KCTC 9790T showed 16S rDNA similarity value of almost 100%. From phylogenetic analysis based on 16S rDNA sequences, it is suggested that the genus Thermoactinomyces should be taxonomically re-evaluated using other useful taxonomic markers., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-50-3-1081