Ascopolyporus sinensis Z. Q. Wang & Y. B. Wang 2026, sp. nov.

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Ascopolyporus sinensis Z. Q. Wang & Y. B. Wang sp. nov. Fig. 2 Etymology. Named after the location, China, where this species was collected. Type. China • Yunnan Province, Pu’er City, Lianhuatang Village, 22°38'N, 100°58'E, alt. 1023 m, associated with M. puerensis Hong Yu bis et al. on the underside of living leaves of dicotyledonous plants. 12 Nov. 2025, Zhiqin Wang (HKAS 154757, holotype; KUNCC 11590, ex-holotype culture). Description. Sexual morph: Unknown. Asexual morph: Colonies on PDA attaining a diameter 35–37 mm after 14 days at 25 ° C, regular wrinkles, white, cottony with high mycelial density, forming a circular bulge in the middle and surrounded by light pink water droplets; reverse pale pink, having pigment produced. Hyphae smooth-walled, branched, septate, hyaline, 0.5–2.9 μm wide. Phialides verticillate, usually in whorls of two to three, or solitary on hyphae, 13.7–25.2 μm long; basal portion cylindrical, tapering gradually toward the apex, 1.1–2.5 μm wide at the base, 0.6–1.6 μm wide at the apex. Conidia smooth, hyaline, enteroblastic, fusiform to acerose, aggregated at the apex of phialides, 2.6–7.5 × 1.2–2.2 µm. Habitat. Associated with M. puerensis on the underside of living leaves of dicotyledonous plants. Distribution. China, Yunnan Province, Pu’er City. Commentary. Phylogenetically, A. sinensis KUNCC 11590 forms a separate clade at the base of the genus Ascopolyporus (Fig. 1). The most notable difference between A. sinensis and other species of Ascopolyporus is its habitat. All previously described species in the genus are associated with scale insects and are attached to the midribs of plant stems and leaves or directly parasitize plants (Thanakitpipattana et al. 2022; Yu et al. 2023). In contrast, A. sinensis was isolated from the stroma of M. puerensis. In addition, A. sinensis produces a pale purplish-pink pigment that diffuses into PDA medium, similar to A. griseoperitheciatus Khons., Thanakitp. & Luangsa-ard. Morphologically, however, the former can be distinguished from the latter by its shorter phialides (13.7–25.2 μm vs. 43–265 μm) (Thanakitpipattana et al. 2022). Among Ascopolyporus species, only A. sinensis and A. tibetensis F. M. Yu et al. have been recorded in China. These two species are phylogenetically distant, and because A. tibetensis has been reported only from sexual stromata in nature, with no successful strain isolation to date, morphological comparison between the two species is difficult.

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