萨氏丝膜菌属物种(中文名暂无)

Thaxterogaster sinoscaurus M.L. Xie, T.Z. Wei & C.T. Li, sp. nov., Fig. 2
Fungal Names FN572110

Diagnosis:—Similar to other species in Thaxterogaster sect. Scauri, but differ in its olive brown to yellowish or orange tinge pileus, rather bigger basidiospores. The ITS sequences of the new species are distinct from other members of the sect. Scauri and deviating from them by at least 17 substitutions and indel positions.

Etymology:—The name refers to the new species’ affinity to T. scaurus and the type location, China.

Holotype:—CHINA. Anhui Province, Lu’an City, Jinzhai County, Tiantangzhai, in mixed forest with Pinus and Quercus trees, 22 September 2023, 31°6′51″ N, 115°46′29″ E, alt. 1500 m, Meng-Le Xie, HMJAU58993.

Description:—Pileus 5.5–8 cm in diam., convex to expanded, with a shallow umbo, viscid, very finely innately fibrillose, center olive brown (4D6), later pale yellow (3A3), grayish yellow (4C5), or brownish orange (6C6), margin olive (3E3-3E5), with strongly hygrophanous streaks at the margin when moist. Lamellae emarginate, up to 6.5 mm wide, moderately crowded, olive (2E4-2E8), olive brown (4D4-4D8) to yellowish brown (5D5-5E7). Stipe 5.5–8 cm long, 1.1–1.7 cm thick at apex, with a marginate bulb at the base, 2.5–3.5 cm wide, surface pale green (29A3) to brown (7C7-7E8), covered with green (28A6-28A8) universal veil remnants, pale blue tinge on apex, basal mycelium with greenish white to light green (28A2-28A4), later almost white (-A1), somewhat hollow. Context in pileus thick, up to 11 mm at the center, whitish (-A1), yellowish (3A4-3B6) near the surface, with a light blue tinge (20A2-20C3) near the lamellae, watery brown (6D5-6E8) when moist, in the upper part of the stipe watery blue (20A6), downwards whitish (-A1), to yellowish (3A4-3B6), bluish tinge (20A2) in the bulb base, later white to yellowish (-A1-A2). Odor weakly, taste mild.

Basidiospores 10.0–12.5 (14.2) × 6.2–7.8 (8.5) μm, Q = 1.41–1.87, X_av. = 11.1–11.4 × 7.0–7.3 μm, Q_av. = 1.52–1.63, ellipsoid to oblong, moderately to fairly strongly, and densely verrucose. Basidia 29–38 × 9–13 μm, 4-spored, clavate, almost colorless in 5% KOH. Lamellar edges fertile. Cystidia absent. Pileipellis: epicutis about 110–130 μm thick, gelatinous, hyphae 2.8–7.2 μm wide, upper part colorless, lower part light brownish in 5% KOH, smooth. Hypodermium present, hyphae 11–25 μm wide, subcellular, yellowish in 5% KOH. Clamp connections present.

Ecology and distribution:—In mixed forests with Pinus and Quercus trees. Known from Anhui and Jilin provinces of China.

Additional specimens examined:—CHINA. Anhui Province, Lu’an City, Jinzhai County, Dabie Mountains, Tiantangzhai, in mixed forest with Pinus and Quercus trees, 22 September 2023, 31°7′1″ N, 115°46′37″ E, alt. 1470 m, Meng-Le Xie, HMJAU58994; 31°7′20″ N, 115°46′49″ E, alt. 1360m, Meng-Le Xie, HMJAU58995. Jilin Province, Yanbian Chaoxianzu (Korean) Autonomous Prefecture, Yanji County, Sandaowan Town, in Quercus mongolica dominant forest with a few Pinus saplings, 23 September 2020, 43°16′17″ N, 129°6′31″ E, alt. 620 m, Meng-Le Xie, HMJAU58992.

参考翻译：

Thaxterogaster sinoscaurus M.L. Xie, T.Z. Wei & C.T. Li, 新种, 图 2
真菌名称 FN572110

特征鉴别：——与 Thaxterogaster 属 Scauri 组的其他种相似，但其菌盖呈橄榄褐色至带黄色或橙色色调，担孢子较大。新种的 ITS 序列区别于该组的其他成员，与其至少有 17 个碱基替换和插入缺失位点的差异。

词源：——该名称指本新种与 T. scaurus 的亲缘关系及其模式产地中国。

主模式：——中国。安徽省，六安市，金寨县，天堂寨，生于松属（Pinus）与栎属（Quercus）混交林中，2023 年 9 月 22 日，北纬 31°6′51″，东经 115°46′29″，海拔 1500 m，谢孟乐，HMJAU58993。

形态描述：——菌盖直径 5.5–8 cm，凸镜形至平展，具浅的脐状凸起，粘，表面具极细的固有纤毛，中央橄榄褐色 (4D6)，后变淡黄色 (3A3)、灰黄色 (4C5) 或褐橙色 (6C6)，边缘橄榄色 (3E3-3E5)，潮湿时边缘具强烈水浸状条纹。菌褶弯生，宽可达 6.5 mm，稍密，橄榄色 (2E4-2E8)、橄榄褐色 (4D4-4D8) 至黄褐色 (5D5-5E7)。菌柄长 5.5–8 cm，顶端粗 1.1–1.7 cm，基部具边缘球茎，宽 2.5–3.5 cm，表面淡绿色 (29A3) 至褐色 (7C7-7E8)，被绿色 (28A6-28A8) 菌幕残余，顶端带淡蓝色调，基部菌丝体绿白色至浅绿色 (28A2-28A4)，后期几乎白色 (-A1)，略中空。菌盖菌肉厚，中央可达 11 mm，带白色 (-A1)，近表面淡黄色 (3A4-3B6)，靠菌褶处具浅蓝色调 (20A2-20C3)，潮湿时水浸状褐色 (6D5-6E8)；菌柄上部菌肉水浸状蓝色 (20A6)，向下带白色 (-A1) 至淡黄色 (3A4-3B6)，球茎基部带蓝色调 (20A2)，后期白色至淡黄色 (-A1-A2)。气味弱，味道温和。

担孢子 10.0–12.5 (14.2) × 6.2–7.8 (8.5) μm，Q = 1.41–1.87，X_av. = 11.1–11.4 × 7.0–7.3 μm，Q_av. = 1.52–1.63，椭圆形至长椭圆形，表面中等至相当强烈且稠密地具疣。担子 29–38 × 9–13 μm，4 孢子，棒状，在 5% KOH 中近无色。菌褶边缘可育。囊状体缺失。菌盖皮层：上表皮厚约 110–130 μm，胶质化，菌丝宽 2.8–7.2 μm，上部无色，下部在 5% KOH 中呈淡褐色，平滑。下皮层存在，菌丝宽 11–25 μm，近细胞状，在 5% KOH 中淡黄色。锁状联合存在。

生态与分布：——生于松属（Pinus）与栎属（Quercus）混交林中。已知分布于中国的安徽省和吉林省。

其他研究标本：——中国。安徽省，六安市，金寨县，大别山，天堂寨，生于松属与栎属混交林中，2023 年 9 月 22 日，北纬 31°7′1″，东经 115°46′37″，海拔 1470 m，谢孟乐，HMJAU58994；北纬 31°7′20″，东经 115°46′49″，海拔 1360 m，谢孟乐，HMJAU58995。吉林省，延边朝鲜族自治州，延吉县，三道湾镇，生于以蒙古栎（Quercus mongolica）占优势并有少量松树幼树的林中，2020 年 9 月 23 日，北纬 43°16′17″，东经 129°6′31″，海拔 620 m，谢孟乐，HMJAU58992。