Nocardia species clusters and their reference sequences*.

Note: Rows of Nocardia species assigned to more than 1 cluster are highlighted in grey.*Only clusters with more than three 16S rRNA gene sequences are shown. For the full list refer to Table S3.**One N. otitidiscaviarum 16S rRNA gene sequence in a cluster of five, suggestive of misclassification in the original submission.***One N. asteroides 16S rRNA gene sequence in a cluster of six, other five sequences belong to N. beijingensis. Suggestive of misclassification in the original submission.