Abstract

Amylosporus annosus sp. nov. sp. nov. is described and illustrated from Malaysia, tropical Asia. It is characterized by perennial, resupinate basidiocarps which are leathery when fresh, woody hard when dry, with white fresh pores which become cream to buff-yellow up on drying, distinct receding sterile margin, a dimitic hyphal structure with dextrinoid skeletal hyphae, generative hyphae bring simple septa only, basidia bearing eight sterigmata, and ellipsoid, fairly thick-walled, finely asperulate, strongly amyloid basidiospore measuring 3–3.7 × 2.4–3 μm. A molecular study based on the combined ITS (internal transcribed spacer region) and nLSU (the large nuclear ribosomal RNA subunit) dataset demonstrated the studied samples formed a new lineage in Amylosporus.