## 3 Results
### Taxonomy
Distributed in Alps [42], America [61], Canada [44],France [6; 46], Germany [47], Greenland [62], Iberian Peninsula and Balearic Islands [49], Italy [52], New Mexico [63], Norway [64], Poland [56], Ukraine [60], and China. Note: This species resembles _Pseudosolorina saccata_ and was previously classified as a high-altitude variant of _P. saccata_. In comparison to _P. saccata_, its thallus is relatively small (<2 cm in diam. ), often exhibiting a covering of pruina; it has two ascospores. Specimens examined: Austria, Salzburg, Tamsweg, Grossek-Speiereck, 47\({}^{\circ}\)7\({}^{\prime}\)54\({}^{\prime\prime}\) N, 13\({}^{\circ}\)38\({}^{\prime}\)17\({}^{\prime\prime}\) E, Alt. 2162 m, 31 August 2019, [PERSON], ZZY-46; China, Sichuan Prov., Hongyuan city, 32\({}^{\circ}\)13\({}^{\prime}\)45.83\({}^{\prime\prime}\) N, 102\({}^{\circ}\)35\({}^{\prime}\)44.75\({}^{\prime\prime}\) E, Alt. 4278 m, 9 April 2020, [PERSON] et al., 20-66618; Yunnan Prov., Kunming city, Tangdan town, Yaojingtang, 26\({}^{\circ}\)15\({}^{\prime}\)27\({}^{\prime\prime}\) N, 102\({}^{\circ}\)95\({}^{\prime}\)79\({}^{\prime\prime}\) E, Alt. 4000 m, 15 September 2024, [PERSON], 24-76716. Figure 5: _Pseudosolorina bispora_ (**(A)**: [PERSON] et al. 20-66618 KUN, **(B)**: [PERSON] 24-76716 KUN, **(C–F)**: [PERSON] ZZY-46 KUN); **(A)**, habit of _P. bispora_; **(B)**, apothecium; **(C)**, white lower surface with brownish momentum; **(D)**, transversal sections of the thallus; **(E)**, transversal sections of the apothecium; **(F)**, accus. Scale bars: 2 mm **(B,C)**; 100 \(\mu\)m **(D)**; 300 \(\mu\)m **(E)**; 40 \(\mu\)m **(F)**. _Pseudosolorina bispora var. monospora_ (Gyeln.) [PERSON] and [PERSON], comb. nov. **Figure** 6  
\(\equiv\) _Solarina monospora_ Gyeln., _Magy. Bot. [PERSON]_, 29: 29 (1930)  
_= Solorina bispora_ var. _monospora_ (Gyeln.) [PERSON], _[PERSON] wiss. Unters. schweiz. NatnParks_, N.S. 3(27): 377 (1952). Fungal Names: FN 572281  
Description: Thallus: small foliose, fragile, dorsiventral, heteromerous, lobate, _ca_ 1 cm in diam. ; Lobes: rounded or irregular, 2-8 mm; Upper surface: bright apple-green when wet, dark green or pale grey to tinged brown when dry, usually covered with white pruina, pale grey to brown-grey, often pruinose; Upper cortex: paraplectenchymatous, colorless, 40-80 \(\upmu\)m thick; Medulla: 40-150 \(\upmu\)m thick; Photobiont: _Coccomyax_ and _Nostoc_, one _Coccomyax_ green-algal layer, c. 20-80 \(\upmu\)m thick, _Nostoc_ exist in internal cephalodia which can be seen on the underside of the thallus as dark spots; Lower cortex: lacking; Lower surface: pale brown, densely tomentose, not or indistinctly veined, rhizines, cephalodia internal,  
Figure 6: _Pseudosolorina bispora_ var. _monospora_ ([PERSON] et al. 20-67082 KUN); (**A**), habit of _P. bispora_ var. _monospora_; (**B**), apothecium; (**C**), white lower surface with brownish tomentum; (**D**), transversal sections of the thallus; (**E**), transversal sections of the apothecium; (**F**), ascus. Scale bars: 2 mm (**B**); 3 mm (**C**); 100 \(\upmu\)m (**D**); 200 \(\upmu\)m (**E**); 40 \(\upmu\)m (**F**). rarely external; Apothecia: large, rounded, irregularly scattered, sunk in depressions in the upper surface, red-brown to black, deeply concave, thalline margin absent; Asci: clavate, _Peltigena_-type, 1-spored; Ascospores: red-brown or dark brown, 2- (3-) septate with median constriction, ellipsoid to fusiform, wall non-uniformly thickened, surface ornamented with broad reticulating ridges and irregular lacunae, 100-160 \(\times\) 35-50 \(\upmu\)m.  
Chemistry: No lichen products detected by TLC. Ecology and distribution: This species is typically found in alpine environments, where it grows on basic soils formed over shaded limestone or calcareous schists. It is distributed in France [46], Iberian Peninsula and Balearic Islands [49], Switzerland [65], and China. Note: This species closely resembles a variant of _P. bispora_ (= _Solarina bispora_ var. _monospora_ (Gyeln.) [PERSON]) in appearance, containing only 1 spore in the ascus.