Sequence similarity calculations (on the basis of 1394 nt) after neighbour-joining analysis (Fig. 1) indicated that the closest relatives of strain GW5-5797T were Nocardia speluncae N2-11T (99.2%), N. jinanensis 04-5195T (99.2%) and Nocardia rhamnosiphila 202GMOT (98.6%). Lower sequence similarities (,98.5 %) were found with other established species of the genus Nocardia. A neighbourjoining tree for strainGW5-5797T and all species of the genus Nocardia with validly published names for which nearly fulllength 16S rRNA gene sequences are available is shown in Supplementary Fig. S1, available in IJSEM Online. Strain GW5-5797T still groups with N. speluncae and N. jinanensis.