Tuber pseudoexcavatum Y. Wang

Tuber pseudoexcavatum Y. Wang et al., Cryptogamie Mycologie, 1998, 19 (1–2): 113–120 (Manjón et al. 2009; Moreno et al. 1997) Notes. The description of Tuber pseudoexcavatum Y. Wang et al. (1998) was originally based on two specimens collected in China and published by Wang et al. in 1998. Subsequently, additional collections (AH 18387, AH 18331) from China were successfully used to generate DNA data, which were deposited in the Herbarium of the Institute of Forestry and Soil Sciences. This study reports two new collections that suggest the presence of this species may not be uncommon in the southwestern region of China. Morphologically, T. pseudoexcavatum is characterized by subglobose ascocarps with a deeply excavate appearance, ranging in color from brown to brown-orange. The surface exhibits a coarsely warted texture, while the asci contain 1–8 ascospores with spinoreticulate ornamentation, which may serve as diagnostic features based on the current collections. The known distribution of this species is limited to China. Material examined. Location • Yunnan Province, Changning County (37.1212°N, 101.7307°E). Habitat: Hypogeous, found in soil beneath a pure Pinus armandii forest Altitude: Approximately 2500 m Collection Date: 20 Sep. 2020 Specimens: YAAS L 3932, YAAS L 3933 Collector: S. H. Li Repository: Herbarium of Institute of Forestry and Soil Sciences (YAAS).