taxonID	type	description	language	source
97D8EE49011D5432ACDE6A13A38A6173.taxon	description	Fig. 2	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
97D8EE49011D5432ACDE6A13A38A6173.taxon	diagnosis	Diagnosis. The new species is distinguished from other Cryptothecia species by its verrucose pseudisidia, which are loosely scattered on the thallus. The upper parts of the pseudisidia are white or have darker dots.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
97D8EE49011D5432ACDE6A13A38A6173.taxon	description	Description. Thallus corticolous, up to 15 cm in diameter, ecorticate, cottony, dull, pale green, loosely attached to the substrate. Pseudisidia verrucose, loosely scattered on the thallus, upper parts white or with darker dots, and most pseudisidia have few projecting hyphae, 0.13 – 0.26 × 0.13 – 0.22 mm. Prothallus is usually distinct, thin, whitish byssoid, mainly composed of interwoven and radiating hyphae, 1.1 – 1.5 mm wide. Medulla white, with calcium oxalate crystals. Photobionts trentepohlioid, cells elliptical to oblong, single or aggregate into bundles, 10 – 23 × 7 – 18 µm. Hyphae 1 – 2.5 µm wide. Asci and pycnidia were not observed.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
97D8EE49011D5432ACDE6A13A38A6173.taxon	etymology	Etymology. The epithet refers to its pseudisidia, which are verrucose and loosely distributed across the thallus.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
730620171A155128B1FB098533134A32.taxon	description	Fig. 3	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
730620171A155128B1FB098533134A32.taxon	diagnosis	Diagnosis. The new species differs from other species of Cryptothecia in its soralia and I – medulla.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
730620171A155128B1FB098533134A32.taxon	description	Description. Thallus corticolous, up to 4 cm in diameter, ecorticate, cottony, dull, pale green, firmly attached to the substrate. Soralia globose, with many calcium oxalate crystals, 0.07 – 0.2 × 0.07 – 0.2 µm. Prothallus is usually distinct, thick, whitish byssoid, mainly composed of interwoven and radiating hyphae, 0.9 – 1.7 mm wide. Medulla white, with calcium oxalate crystals. Photobionts trentepohlioid, cells rounded to elliptical, single or aggregate into bundles, 7 – 12 × 6 – 12 µm. Hyphae 1 – 2.5 µm wide. Asci and pycnidia were not observed.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
730620171A155128B1FB098533134A32.taxon	etymology	Etymology. The epithet refers to the presence of soralia on its thallus.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
91DCB7B4BE045AE2B50D74C823DB5907.taxon	description	Fig. 4	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
91DCB7B4BE045AE2B50D74C823DB5907.taxon	diagnosis	Diagnosis. The new species differs from other species of Myriostigma in the presence of black or purple dots on the thalli and hyaline to pale yellow ascospores (63 – 71 × 26 – 33 µm).	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
91DCB7B4BE045AE2B50D74C823DB5907.taxon	description	Description. Thallus corticolous, up to 6 cm in diameter, ecorticate, cottony, dull, greenish grey to whitish grey, with black or purple dots, firmly attached to the substrate. Isidia not observed. Prothallus is usually distinct, thin, whitish byssoid, mainly composed of interwoven and radiating hyphae, 0.7 – 1.3 mm wide, forming a dark brown to black line while bordering different species. Medulla white, with calcium oxalate crystals. Photobionts trentepohlioid, cells rounded to elliptical, single or a few cells aggregated, 5 – 11 × 5 – 8 µm. Hyphae 1 – 2 µm wide. Ascigerous areas are distinct, generally delimited, erumpent, slightly raised above the thallus level, plaque, irregular in outline, white with dense brown dots indicating individual asci. Asci frequent, hyaline, pale yellow when mature, globose to subglobose, often covered by hyaline hyphae, 8 - spored, 103 – 115 × 97 – 115 µm. Ascospores hyaline, pale yellow when mature, oblong, muriform, curved, often broader in the centre, 63 – 71 × 26 – 33 µm. Pycnidia were not observed.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
91DCB7B4BE045AE2B50D74C823DB5907.taxon	etymology	Etymology. The epithet refers to the presence of black or purple dots on the thallus.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
300734BC667D58549AD577EDF677CE68.taxon	description	Fig. 5	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
300734BC667D58549AD577EDF677CE68.taxon	diagnosis	Diagnosis. The new species differs from other species of Myriostigma in ascigerous areas, which have many irregular small patches that are scattered or clustered together radially elongated; hyaline ascospores (31 –) 37 – 74 × (14 –) 17 – 29 µm.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
300734BC667D58549AD577EDF677CE68.taxon	description	Description. Thallus corticolous or bambusicolous, up to 6.5 cm in diameter, ecorticate, cottony, dull, pale green to greenish grey, firmly attached to the substrate. Isidia not observed. Prothallus is usually distinct, thin, whitish byssoid, mainly composed of interwoven and radiating hyphae, 0.8 – 2.5 mm wide, forming a dark brown to black line while bordering different species. Medulla white, with calcium oxalate crystals. Photobionts trentepohlioid, cells elliptical to oblong, single or aggregate into bundles, 6 – 14 × 6 – 9 µm. Hyphae 1 – 2 µm wide. Ascigerous areas are distinct, generally delimited, slightly raised above the thallus level, developing in the thallus centre, colour lighter than the thallus, many irregular small patches that are scattered or clustered together radially elongated. Asci hyaline, globose to subglobose, often covered by hyaline hyphae, 8 - spored, 82 – 91 × 81 – 90 µm. Ascospores hyaline, oblong, muriform, curved, often broader in the centre, (31 –) 37 – 74 × (14 –) 17 – 29 µm. Pycnidia hyaline, globose to subglobose, scattered and immersed across the thallus, 55 – 85 × 54 – 80 μm. Conidia hyaline, short bacilliform, 4 – 5 × 0.9 – 1 μm.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
300734BC667D58549AD577EDF677CE68.taxon	etymology	Etymology. The epithet refers to its ascigerous areas having many irregular pale green small patches.	en	Xue, Junxia, Yang, Zihao, Li, Ruotong, Zhang, Lulu (2025): Four new species of Cryptothecia (Arthoniaceae, Ascomycota) and Myriostigma (Arthoniaceae, Ascomycota) from China, based on morphology and molecular phylogeny. MycoKeys 114: 367-383, DOI: 10.3897/mycokeys.114.139180
