Pseudonocardia spinosispora sp. nov., isolated from Korean soil.

A new strain of the genus Pseudonocardia, which was isolated from a Korean soil sample, is described. The organism shows distinct cultural characteristics in that it forms well-developed aerial mycelium that fragments into rod-shaped, spiny spores, and grows only in standing culture but not in shake culture. Substrate mycelium is sparse or absent in most media used.

Proposal to transfer Catellatospora ferruginea and 'Catellatospora ishikariense' to Asanoa gen. nov. as Asanoa ferruginea comb. nov. and Asanoa ishikariensis sp. nov., with emended description of the genus Catellatospora.

The taxonomic position of Catellatospora ferruginea and 'Catellatospora ishikariense' was investigated by phylogenetic, chemotaxonomic and physiological characterization. The 16S rDNA sequences of the organisms were compared with those of members of the genus Catellatospora and other genera of the Micromonosporaceae and phylogenetic trees were inferred by using distance-matrix and parsimony methods. The organisms formed a distinct cluster within the radiation of this family that was supported by a high bootstrap value, of 100%.