Stratocorticium sinensis gen. et sp. nov. and Cericium gloeocystidiatum sp. nov. (Cyphellaceae, Agaricales) from East Asia

<i>Cyphellaceae</i>, a small and under-studied family of <i>Agaricales</i>, includes mostly saprophytic taxa with varied basidiomes. In this study, we focus on wood-decay species with corticioid or stereoid basidiomes. Phylogenetic analyses of concatenated <i>ITS</i>-<i>nrLSU</i> sequences uncovered seven generic lineages of corticioid or stereoid fungi-<i>Acanthocorticium</i>, <i>Cericium</i>, <i>Chondrostereum</i>, <i>Cunninghammyces</i>, <i>Gloeostereum</i>, <i>Granulobasidium</i>, and <i>Stratocorticium</i> gen. nov. The genus <i>Cericium</i> is shown to be in the <i>Cyphellaceae</i> family, and two new species, <i>Cericium gloeocystidiatum</i> and <i>Stratocorticium sinensis</i>, are described from East Asia. Morphologically, <i>Ce</i>. <i>gloeocystidiatum</i> is characterized by resupinate basidiomes with smooth hymenophores, a dimitic hyphal system with clamped generative hyphae and micro-binding hyphae, cystidia with resinous-like or golden yellow contents, and ellipsoid basidiospores. <i>Stratocorticium</i> is monotypic, differing from <i>Cericium</i> by a trimitic hyphal system of clamped generative, micro-binding, and brown, thick-walled skeletal-like hyphae, clavate to cylindrical cystidia with homogenous, colorless contents, and hyphidia. Descriptions and illustrations are provided for the new taxa and <i>Cericium luteoincrustatum</i>, and a key to corticioid or stereoid genera in <i>Cyphellaceae</i> is included.