Four New Wood‑Inhabiting Fungi Discovered in East China

A team of scientists from several institutions reported the discovery of four novel wood‑inhabiting fungi belonging to the genus Botryobasidium (Cantharellales, Basidiomycota) in eastern China. The study was published in volume 139 of MycoKeys, pages 321–339 ¹.net].

The authors—Wen Jing, Wan-Ying Li, Viktor Papp, Qian-Xin Guan, Zi-Wei Zheng, Yu-Jin Cui, and Fang Wu—used a combination of morphological examination and phylogenetic analyses based on internal transcribed spacer (ITS) plus large subunit nuclear ribosomal RNA gene (nLSU) sequences to delimit the new taxa. They described B. fujianensis, B. fusisporellum, B. subconiferarum, and B. macrosporum. Each species is distinguished by subtle differences in hymenial surface texture, hyphal system, basidia shape, and spore dimensions. For example, B. fujianensis has a hypochnoid, floccose to cottony white‑to‑greyish‑white hymenium with monomitic hyphae that possess simple septa; its barrel‑shaped basidia bear four or six sterigmata, producing pip‑shaped spores measuring 6.0–7.9 × 2.3–3.4 µm. In contrast, B. fusisporellum features long barrel‑shaped basidia with two or four sterigmata and fusiform spores sized 5.3–6.5 × 2.3–3.0 µm, while B. subconiferarum displays a similar hymenial appearance but differs in spore size ranges.

The phylogenetic tree constructed from the combined ITS+nLSU dataset placed all four new species into distinct clades, supporting their status as separate taxa within Botryobasidium. This approach mirrors recent mycological studies that integrate multilocus data to resolve closely related fungi ¹.net].

From an ecological perspective, these discoveries add depth to our knowledge of fungal diversity in eastern Chinese forests. Previous surveys have reported comparable numbers of novel mushroom species across specific regions over the past decade; this work continues that trend by expanding the known inventory of wood‑inhabiting Basidiomycota in Asia ¹.net]. While none of the newly described species are currently recognized as edible, their presence underscores the rich yet underexplored fungal fauna associated with forest timber. Foragers interested in identifying local mushrooms should note that Botryobasidium species often exhibit subtle morphological traits and require careful microscopic examination—skills that can also aid in distinguishing other ectomycorrhizal or saprotrophic genera encountered during fieldwork.

Overall, the identification of four new B. species highlights both the continued potential for discovering previously unknown fungi in well‑studied regions and the importance of combining detailed morphology with molecular phylogenetics when cataloguing biodiversity. The findings will inform future conservation assessments and may serve as a baseline for monitoring changes in forest ecosystems where these fungi occur.