Lecaimmeria mongolica C.M. Xie & Lu L. Zhang, 2022
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publication ID |
https://dx.doi.org/10.3897/mycokeys.87.72614 |
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persistent identifier |
https://treatment.plazi.org/id/0B67465A-4C62-5C9C-A1C3-8434914B523E |
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treatment provided by |
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scientific name |
Lecaimmeria mongolica C.M. Xie & Lu L. Zhang |
| status |
sp. nov. |
Lecaimmeria mongolica C.M. Xie & Lu L. Zhang sp. nov.
Figure 8a-d View Figure 8
Etymology.
The name " Lecaimmeria mongolica " refers to the collection of the holotype within Inner Mongolia, an autonomous region of China.
Type.
China. Inner Mongolia: Chifeng City, Balinyouqi, Han Mountain , 1445m elev., 44°11'N, 118°44'E, on rock, 22 Jul 2019, Zun-Tian Zhao et al. SDNU20190354 (SDNU-holotype) GoogleMaps .
Description.
Thallus areolate, orange, continuous; areolae 0.4-0.8 mm across, epruinose, neatly arranged, irregular, tending to be rectangular, margin pruinose; prothallus black, not distinct. Upper cortex ca. 20.0 μm thick, brown; epinecral layer 5.0-8.0 μm thick; algal layer ca. 87.0 μm thick, cells 7.5-12.5 μm diam., round. Apothecia frequent, crowded, immersed or isolated from areolae, 0.2-0.8 mm in diam.; disc red-brown, flat, slightly convex, epruinose; margin pruinose. Hymenium 62.0-83.0 μm thick, colourless; paraphyses ca. 2.0 μm wide, unbranched, not anastomosing; epihymenium ca. 42.0 μm thick, orange; plectenchyma 5.0-10.0 μm thick; subhymenium 30.0-38.0 μm thick, colourless; hypothecium brown. Asci Porpidia -type, cylindrical, eight-spored; ascospores 10.0-17.5 × 6.0-7.5 μm in diam., ellipsoid, halonate. Conidiomata immersed, oblate, rare ellipsoid, black, margin pruinose; conidia 5.0 × 1.0 μm, bacilliform.
Chemistry.
Thallus K-, C+. Medulla I+ violet. Gyrophoric acid.
Ecology and distribution.
In China, growing on granite at elevations of 1400-2000 m in steppe or mountains. This species is known from Inner Mongolia of China.
Notes.
This species was once reported as " Immersaria " Immersaria cupreoatra from China ( Zhang et al. 2015), but after comparing our collections with the type material, this was found to be a misclassification. Additionally, the phylogenetic results showed that these collections formed a well-supported lineage belonging to Lecaimmeria . Therefore, it is here treated as a new species, Lecaimmeria mongolica , characterised by its orange-brown thallus, red-brown apothecia with a distinct white margin and the thallus containing gyrophoric acid. Lecaimmeria cupreoatra resembles L. mongolica by containing gyrophoric acid, but it differs in its dark black brown thallus and the black margin of its apothecia. Lecaimmeria tibetica is similar to L. mongolica in its orange thallus, but differs in its smaller, dark orange apothecia and that no substance can be detected by TLC.
Specimens examined (SDNU).
China. Inner Mongolia: Chifeng City, Balin Youqi, Mt. Qingyangcheng , 1445 m elev., 43°35'N, 117°30'E, on rock, 2019, Zun-Tian Zhao et al. SDNU20190350; Han Shan, 1563 m elev., 44°11'N, 118°44'E, on rock, Zun-Tian Zhao et al. SDNU20190354; A’ershan City, Mt. Jiguan , 1500 m elev., on rock, 2011, Yu-Liang Cheng SDNU20124912, 1400 m elev., Dai-Feng Jiang SDNU20124859; Ke Qi, Huanggangliang, 2000 m elev., on rock, Pan-Meng Wang SDNU20117613, Xing-Ran Kou SDNU20117399 GoogleMaps .
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