Multiple evidence reveals two new species and new distributions of Calocybe species (Lyophyllaceae) from northeastern China Author Ma, Ao https://orcid.org/0000-0001-8635-9767 School of Life Science, Northeast Normal University, Changchun 130024, China Author Hu, Jia-Jun https://orcid.org/0000-0002-7562-7612 Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China & Joint Laboratory of International Cooperation in Modern Agricultural Technology, Ministry of Education, Jilin Agricultural University, Changchun 130118, Jilin Province, China Author Chen, Yue-Qu College of Life Science, Zhejiang Normal University, Jinhua 321004, Zhejiang Province, China Author Wang, Xin Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China Author Tuo, Yong-Lan https://orcid.org/0000-0001-6019-1038 Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China Author Yue, Lei Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China Author Li, Xue-Fei https://orcid.org/0009-0005-2556-6494 Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China Author Dai, Dan https://orcid.org/0000-0002-9642-2480 Forestry Resources Protection Institute, Jilin Provincial Academy of Forestry Sciences, Changchun 130033, Jilin Province, China Author Wei, Yun-Hui Forestry Resources Protection Institute, Jilin Provincial Academy of Forestry Sciences, Changchun 130033, Jilin Province, China Author Zhang, Bo https://orcid.org/0000-0001-9508-8188 Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China zhangbufungi@126.com Author Li, Yu https://orcid.org/0000-0003-4719-7210 Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China fungi966@126.com text MycoKeys 2024 2024-03-13 103 37 55 http://dx.doi.org/10.3897/mycokeys.103.116605 journal article http://dx.doi.org/10.3897/mycokeys.103.116605 1314-4049-103-37 E568A496D2A35D1C9CF7F327D74619BD Calocybe decolorata X.D. Yu & Jia J. Li Figs 4B , 6 Description. Basidiomata scattered or gregarious, small to medium. Pileus 1.3-5.0 cm diameter, convex to applanate, involute then becoming reflex, orange-brown (7C8) at center, paler outwards, smooth, hygrophanous; margin petaloid, wavy, orange (6B8). Lamellae subdecurrent, close, white (6A1) at first, black (6E2) at the base to the three-quarter towards the margin when mature, with 1-5 lamellulae, edge denticulate. Stipe 2.3-4.2 cm long and 0.3-0.9 cm wide, central, cylindrical, or enlarged at apex, light orange-brown (6A6), with green tone at center, covered with white tomentose at base, hollow when mature. Context fleshy, thin, odorless. Figure 6. Microcharacteristics of Calocybe decolorata A basidiospores B basidia C pileipellis. Scale bars: 5 μm ( A ); 10 μm ( B, C ). Basidiospores (2.0)2.9-5.0 x (1.5)2.0-3.2 μm , Q = (1.15)1.17-1.50(1.60), Qm = 1.34, subglobose, hyaline, inamyloid, smooth, thin-walled. Basidia 11.1-21.5 x 3.7-6.0 μm , clavate, 2-spored, occasionally 4-spored, hyaline, thin-walled. Hymenophoral trama regular and hyphae arranged parallel, not pigmented, 2-3 μm wide. Pileipellis an epicutis composed of dense, radially parallel, hyphae 2.5-11.3 μm in width, smooth, hyaline, terminal cells a bulbous shape. Stipitipellis hyphae smooth, pigmented, 2.5-8.8 μm diameter. Specimen examined. China. Jilin Province, Changchun City, Jilin Agricultural University, 21 Aug 2019, Jia-Jun Hu and Gui-Ping Zhao, HMJAU48262 (Collection no.: Hu J.J. 591). Habitat. Grows on the leaves' litter in broad-leaved forests. Comments. This species was originally described from Liaoning Province, China by Li et al. (2017) and is mainly characterized by a brighter orange or yellow color pileus, light orange-brown stipe, and smaller basidiospores. The species was classified as a species of Sect. Calocybe Carneoviolaceae based on its main morphological characteristics. However, there are some differences between our specimen and the type specimen. The specimens observed in this study have bulbous-like terminal hyphae in the pileipellis, which were not described in the type species.