taxonID	type	description	language	source
F97C87A5FFCAF969FF00F8F6D251FD17.taxon	diagnosis	Diagnosis: Tephrocybella calocyboides differs from other closely related species by its pale orange-yellow pileus; all surfaces of basidiomata turn black when bruised. Holotype: China. Liaoning Province, Shenyang, Shenyang Agricultural University, Tianzhu Mountain, on the soil, 90.5 m, 27 August 2019, 41 ° 49 ′ 50.50 ″ N 123 ° 34 ′ 3.3 ″ E, leg. X. D. Yu (SYAU-FUNGI- 84). Etymology: “ calocyboides ” refers to the bright color of the new species, similar to that of species of the genus Calocybe. Description: Basidiomata are small. Pileus 1.5 – 3.0 cm in diameter, convex at first, with a constant central umbo, hygrophanous surface, pale orange – yellow (3 B 5 – 3 B 8), and irregularly flexuous edge. Lamellae 1.0 – 2.0 mm broad, slightly adnate, moderately crowded, pale orange yellow (3 B 5) to light orange yellow (4 C 5), smooth edges, and concolorous. Stipe 2.0 – 3.5 cm long, 0.3 – 0.6 cm diameter, central, stuffed, cylindrical, slightly curving, light orange yellow (4 C 5) to mars yellow (4 C 8) at the base, some white (3 A 1) pruina on the surface of the stipe. Smell farinaceous. All basidiomata surfaces turned black when bruised. Basidiospores (2.8) 3.5 – 4.0 (5.5) × (1.8) 2.4 – 2.7 (4.2) μm, Q = (1.20) 1.32 – 1.51 (1.97) μm (n = 30), average Q = 1.51, ellipsoid, hyaline, and inamyloid. Under an electron microscope, a small round verruculose attached to the surface of the basidiospores was observed. Each wart 0.02 – 0.1 μm in diameter. Basidia (15.2) 16.7 – 20.5 (23.5) × (2.4) 3.1 – 4.3 (4.9) μm, clavate, 4 - spored, hyaline, siderophilous granules observed. Hymenial cystidia are absent. Hymenophoral trama 150 – 180 μm thick, subregular, consisting of 2.0 – 5.0 μm wide, thin-walled, hyaline, subparallel hyphae. Subhymenium 9.5 – 12.0 μm thick. Pileipellisis a cutis of dense, subparallel, repent branched hyphae, hyphae 1.8 – 3.5 μm wide, thin-walled, and mainly vacuolar pigment. Stipitipellis hyphae 2.3 – 6.5 μm wide, thin-walled, hyaline. Caulocystidia absent. Clamp connections are present everywhere, but they are not numerous. Habitat and distribution: Saprophytic and scattered in soil near forests or roads. Known in Northeast China. Additional specimens examined: China. Liaoning Province: Shenyang, Campus of Shenyang Agricultural University, on the soil, on August 26, 2019, 41 ° 49 ′ 50.50 ″ N 123 ° 34 ′ 3.3 ″ E, leg. X. D. Yu (SYAU-FUNGI- 085). Notes: Tephrocybella calocyboides is primarily characterized by its small basidiomata, pale orange-yellow pileus, concolorous and adnate lamellae, blackening when bruised, and verruculose basidiospores. Tephrocybella calocyboides clustered with T. griseonigrescens and T. constrictospora in a well-supported clade (1.00 PP and 100 % BS). The basidiomata of T. calocyboides and T. griseonigrescens turn black when bruised, whereas T. calocyboides has a pale orange-yellow pileus, and T. griseonigrescens has a pale grayish pileus. The pileus surface of T. constrictospora is ochraceous brown; therefore, it differs from that of T. calocyboides. Moreover, T. calocyboides lacks cheilocystidia, whereas T. griseonigrescens and T. constrictospora have them (Clericuzio et al. 2017).	en	Hou, Jian-Xuan, Qi, Yue, Lyu, Jin-Xin, Xu, Ai-Guo, Zhao, Jia-Chen, Guo, Hong-Bo, Yang, Rui- Heng, Yu, Xiao-Dan (2025): Tephrocybella calocyboides sp. nov. from Liaoning Province, China and an identification key for Tephrocybella. Phytotaxa 695 (1): 115-122, DOI: 10.11646/phytotaxa.695.1.6, URL: https://doi.org/10.11646/phytotaxa.695.1.6
