Isolate X2Bc2 in ardra cluster xl was found to be closely related to micrococcus yannanensis YIM 65004T (99.79% sequence identity), a novel species isolated from tree roots (polyspora axillaris) in China , whereas isolate G1Dc3 from ARDRA cluster lv was most similar to the coryneform bacterium , Microbacterium arborescens DSM 20754T (99.33% sequence identity).