Megasporia is a newly established polypore genus characterized by resupinate fruiting bodies with big pores, a dimitic hyphal structure with generative hyphae bearing clamp connections, more or less dextrinoid and cyanophilous skeletal hyphae, cylindrical, hyaline, thin-walled, smooth basidiospores, and growth mostly on fallen angiosperm branches. Species number is extremely rich in subtropical and tropical Asia. Three new species, namely M. rimosa, M. tropica and M. yunnanensis are described from China, and their illustrated descriptions are given. Differences between these new species and phylogenetically related and morphologically similar species are discussed. A key to the known species of Megasporia is provided.

During a taxonomic study on Wrightoporia from South China, four species new to China were collected: W. cinnamomea, W. labyrinthina, W. ochrocrocea, and a new species described as W. biennis. Wrightoporia biennis is characterized by a biennial growth habit, non- to weakly dextrinoid and distinctly narrow skeletal hyphae, abundant thickwalled gloeoplerous hyphae, presence of thin-walled cystidia, and asperulate basidiospores. Illustrations and descriptions of these species are provided based on the Chinese materials.

Two oomycetes, Phytopythium mercuriale and Pp. sindhum were found in southern China, and they are newly recorded in China. These two species were both isolated from roots of soybean. Pp. mercuriale is characterized by subglobose sporangia with conspicuous apical papillae, and occasionally forming oogonia. And Pp. sindhum is identified from other Phytopythium species by its globose to sub-globose sporangia with conspicuous apical papillae, large and smooth oogonia, monoclinous or diclinous antheridia, and plerotic or nearly plerotic and thick-walled oospores. Illustrations and descriptions of the two new records are provided based on the materials from China.