Hydnum pallidomarginatum T. Cao & H. S. Yuan, 2021 Fig. 7 A – E Habitat and distribution. The species grows gregariously in a Q. serrata forest within the core zone of Tianma National Nature Reserve, China (ca. 900–1000 m, subtropical monsoon climate). It is currently documented in Anhui Province, Yunnan Province, Heilongjiang Province, and Liaoning Province in China. The specimen was collected at a distance of 10.6 cm from a Q. serrata tree (DBH: 36.2 cm). Soil temperature was 19.8 ° C, soil volumetric water content was 23.2 %, soil pH was 6.2, air temperature was 22.0 ° C, and relative humidity was 92.5 %. Soil temperature, moisture content, and pH were measured at the time of sample collection; air temperature and humidity were monitored over the long term within the sample plot (measurements were taken at 10 - minute intervals; these data are mean values calculated over the 3 days preceding and following sample collection). Specimens examined. China • Anhui Province, Lu’an City, Tianma National Nature Reserve, 31°15'14"N, 115°42'10"E, Elevation: ca. 960 m, 11 October 2023, Yonglan Tuo (FJAU 66578), GenBank accession numbers: ITS = PV 875857, tef 1-α = PV 889366. • Anhui Province, Lu’an City, Tianma National Nature Reserve, 31°15'09"N, 115°42'13"E, Elevation: ca. 954 m, 12 October 2023, Yonglan Tuo (FJAU 66579), GenBank accession numbers: ITS = PV 875858, tef 1-α = PV 889367. Notes. H. pallidomarginatum is characterized by its white to yellowish-white pileus, 2–4 sterigmata, and globose to subglobose basidiospores. It was described from Yunnan Province, China. We examined collections from Yunnan and several DNA sequences from China annotated as H. pallidomarginatum in the database. No major differences were found between our specimens and the holotype, except for the color of the pileus. The multi-marker phylogenetic analyses revealed that the two Chinese H. pallidomarginatum specimens form a monophyletic cluster within H. pallidomarginatum.

Published as part of Tuo, Yonglan, Chu, Hang, Wang, Libo, Qi, Zhengxiang, Hu, Jiajun, Zhang, Bo, Li, Yu & Li, Xiao, 2026, Three new species and two new records of Hydnum (Hydnaceae, Cantharellales) from the Dabie Mountains, China, pp. 167-195 in MycoKeys 128 on pages 167-195, DOI: 10.3897/mycokeys.128.168361