Revision of Immersaria and a new lecanorine genus in Lecideaceae (lichenised Ascomycota, Lecanoromycetes) Author Xie, Cong-Miao https://orcid.org/0000-0001-9973-3594 Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, Shandong, 250014, China Author Wang, Li-Song CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Heilongtan, Kunming, Yunnan, 650204, China Author Zhao, Zun-Tian Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, Shandong, 250014, China Author Zhang, Yan-Yun https://orcid.org/0000-0002-0902-5066 CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Heilongtan, Kunming, Yunnan, 650204, China Author Wang, Xin-Yu https://orcid.org/0000-0003-2166-6111 CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Heilongtan, Kunming, Yunnan, 650204, China wangxinyu@mail.kib.ac.cn Author Zhang, Lu-Lu Institute of Environment and Ecology, Shandong Normal University, Jinan, Shandong, 250014, China 612038@sdnu.edu.cn text MycoKeys 2022 2022-02-15 87 99 132 http://dx.doi.org/10.3897/mycokeys.87.72614 journal article http://dx.doi.org/10.3897/mycokeys.87.72614 1314-4049-87-99 462A78A6A4745A33A766A2045115F58F Lecaimmeria tuberculosa C.M. Xie & Xin Y. Wang sp. nov. Figure 10f-i Etymology. The name " Lecaimmeria tuberculosa " refers to the tuberculiform conidiomata. Type . China . Gansu Province : Zhangye City , Sunan Co. , Along the way from Sunan to Qilian , 3928 m elev., 38°37'N , 99°28'E , on rock, 30 May 2018 , Li-Song Wang et al. 18-58865 (KUN-holotype) . Description. Thallus areolate, red-brown, continuous; areolae 0.5-1.3 mm across, slightly convex, epruinose; margin pruinose, often jade-green pigmented; prothallus not distinct. Upper cortex ca. 27.0 μm thick, orange; epinecral layer up to 28.0 μm thick, uneven, sometimes absent; algal layer ca. 50.0 μm thick, cells 6.0-10.0 μm diam., round. Apothecia frequent, scattered, immersed, 0.3-0.6 mm in diam.; disc red-brown, concave, epruinose; margin absent. Hymenium 55.0-83.0 μm thick, colourless; paraphyses ca. 2.0 μm wide, unbranched, not anastomosing; epihymenium 15.0-30.0 μm thick, orange; plectenchyma ca. 5.0 μm thick, discontinuous; subhymenium ca. 38.0 μm thick, colourless; hypothecium brown. Asci Porpidia -type, cylindrical, eight-spored; ascospores 6.0-12.5 x 3.0-5.0 μm in diam., ellipsoid, halonate. Conidiomata stellate, strongly convex, rarely immersed, forming tuberculiform, black, margin pruinose, jade-green pigmented; conidia 3.0-4.5 x 1.0 μm in diam., oblong to bacilliform. Chemistry. Thallus K-, C-. Medulla I+ violet. No substances by TLC. Ecology and distribution. In China, growing on the Qilian jade or sandstone at elevations of 3900-4200 m in the alpine zone. This species is known from Qinghai Province and Gansu Province of China. Notes. Lecaimmeria tuberculosa is characterised by its red-brown thallus, the jade-green pruinose colour at the margin of its areolae, its red-brown, concave apothecia without a proper margin and tuberculiform conidiomata. Lecaimmeria qinghaiensis is similar to L. tuberculosa (see notes for L. qinghaiensis ). Lecaimmeria tuberculosa usually grows on jade and, interestingly, the margin of the conidiomata and areolae of the species are heavily jade-green pigmented. Lecaimmeria iranica resembles L. tuberculosa by the absence of an apothecial margin, but differs in its immersed conidiomata and the white margin of its areolae. Specimens examined (KUN). China . Qinghai Province : Gande Co. , Qingzhen Village , 4124 m elev., 34°11'N , 100°12'E , on rock, 2020, Li-Song Wang et al. 20-68077, 4145 m elev., Li-Song Wang et al. 20-68055 . Gansu Province : Zhangye City , Sunan Co. , along the way from Sunan to Qilian , 3928 m elev., 38°37'N , 99°28'E , on rock, 2018, Li-Song Wang et al. 18-58856, 18-58857, 18-58865, 18-59835 .