Antrodia tropica sp. nov. from southern China inferred from morphological characters and molecular data

Antrodia tropica sp. nov. is described and illustrated on the basis of collections originating from Hainan, southern tropical China. Both the morphology and phylogenetic analysis of rDNA ITS sequences support this new species. Morphologically, it is characterized by resupinate basidiocarps, an annual growth habit, greyish to pinkish buff pore surface, a dimitic hyphal system with clamped generative hyphae, and cylindrical to subfusiform basidiospores. The hymenophoral trama is dominated by generative hyphae, whereas skeletal hyphae are dominant in the subiculum. Molecular phylogeny inferred from ITS sequence data suggested a close relationship between A. tropica and two other Antrodia species, including A. huangshanensis reported from China and A. ramentacea found mostly in boreal Eurasia.