Tuber calosporum S. P. Wan

Tuber calosporum S. P. Wan et al. Mycoscience, 2016, 57 (6): 393–399 Note. Tuber calosporum S. P. Wan et al. was originally described based on four specimens collected from Huize County in Yunnan Province, as detailed by Wan et al. in 2016. The specimens (wsp 352, wsp 145, wsp 186, and wsp 382) provided successful DNA data. This study introduces two additional collections, suggesting a broader distribution of the species in the southwest region of China. Morphologically, T. calosporum is recognized by its brownish-yellow ascocarps with a verrucose surface, featuring superficial yellow furrows. The ascospores are characterized by their large, ellipsoid shape and shallow alveolar ornamentation, which can serve as diagnostic traits based on the present collections. The species is known to occur exclusively in China. Material examined. Location • Yunnan Province, Xiangyun County (25°39'43"N, 100°52'27"E) Habitat: Found in soil beneath a mixed forest dominated by Pinus yunnanensis Collection Date: 20 Sep 2020 Specimens: YAAS L 3648, YAAS L 3684 Collector: S. H. Li Repository: Herbarium of Institute of Forestry and Soil Sciences (YAAS).