taxonID	type	description	language	source
908479760C7C54BCA113EB71E85C5BB1.taxon	description	Fig. 2	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
908479760C7C54BCA113EB71E85C5BB1.taxon	diagnosis	Diagnosis. Similar to Trimmatothelopsis versipellis but differing in having IKI + blue turning red hemiamyloid hymenial gel and in having the IKI + blue ascus.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
908479760C7C54BCA113EB71E85C5BB1.taxon	etymology	Etymology. The epithet refers to the black carbonized apothecia when mature.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
908479760C7C54BCA113EB71E85C5BB1.taxon	description	Description. Thallus rare, of dispersed or contiguous irregular areoles, (0.15 –) 0.5 – 0.75 mm wide, sometimes indistinct, replicating by division, usually a biofilm composed of soil particles and algal cells at the immature apothecia base, ca. 30 – 50 μm thick, then dead when apothecia mature and easy separation from the substrate. Upper surface dull brown to black, rough, epruinose. Epicortex thin, ca. 5 μm thick. Cortex 25 – 40 μm thick, upper layer 10 – 15 μm thick, brown, lower layer hyaline. Algal layer continuous, uninterrupted, sometimes extending below apothecia, algal cells ca. 10 μm wide. Medulla obscured with crystals and gelatinization. Apothecia usually 1 – 3 (– 8) per areole, often with compound apothecia, 0.25 – 0.5 mm in diameter, brown to black, hemispherical, sometimes irregular, usually arising individually from the biofilm, initially punctiform, later dilated, sometimes arising individually from thallus, disc dull brown to black, usually carbonized, ca. 0.15 mm wide, usually circular, slightly concave or flat, sometimes with an umbo of the same color as the disc, (10 –) 12.5 – 15 (– 25) μm thick, rarely with slightly elevated apothecial crown. Out wall of apothecia (10 –) 12.5 – 15 (– 25) μm thick, carbonized, with inter thalline area sometimes absent, resulting in a space between the carbonized outer wall and the hymenium. Parathecium 40 – 50 μm thick, IKI-. Hymenium (200 –) 225 – 250 μm high, paraphyses 1.5 – 2 μm wide, apices expand, up to 4 μm wide, hymenial gel IKI + blue turning red, hemiamyloid, if IKI too diluted with water on the slide, the reaction is IKI- pale yellow. Asci clavate, 110 – 140 × 15 – 25 μm, ascus stain IKI + light blue tholus and space between the outer and inner wall of the ascus before ascospores fill the asci, ascospores several hundred per asci, narrowly ellipsoid, (4 –) 5 – 6 (– 7) × 1.5 – 2 μm. Subhymenium ca. 50 – 75 μm thick, IKI +, blue. Hypothecium obscured, ca. 10 – 20 μm thick, IKI-. Pycnidia not observed. Not producing secondary metabolites.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
00EBD4A3ADBC5C01B996EE965E8B39BA.taxon	description	Fig. 3	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
00EBD4A3ADBC5C01B996EE965E8B39BA.taxon	diagnosis	Diagnosis. Similar to Trimmatothelopsis montana but differing in having wider thallus (up to 9 cm vs. up to 4 cm), in having completely immersed apothecia, and in having hymenial gel IKI + blue turning red, hemiamyloid (vs. IKI + blue-black amyloid).	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
00EBD4A3ADBC5C01B996EE965E8B39BA.taxon	etymology	Etymology. The species is named in honor of lichenologist and taxonomist Kerry Knudsen from the Czech Republic for his excellent revision of the genus Trimmatothelopsis and continuing work on the Acarosporaceae of California and southwestern North America, USA.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
00EBD4A3ADBC5C01B996EE965E8B39BA.taxon	description	Description. Hypothallus usually distinct, thick, grayish to greenish, irregular in outline. Thallus epilithic, continuous and rimose, to 9 cm wide, ca. 150 μm thick, pale greyish green, pale green, yellowish brown to brown, sparingly to richly rimose with cracks, somewhat pulpy when wetted, sometimes easily entirely peeling from rock. Epicortex absent. Cortex (5 –) 20 – 40 μm thick. Algal layer (25 –) 30 – 35 (– 75) μm thick, continuous, rarely interrupted by hyphal bundles, algal cells 5 – 9 μm wide. Medulla ca. 75 μm thick, obscured, sometimes interspersed with a few algal cells. Apothecia rather numerous, scattered, immersed, mostly solitary, sometimes with compound apothecia, disc up to 0.45 mm wide, usually level with the thallus, slightly convex or flat, rough or smooth, reddish brown or whitish with a brown circle at center, sometimes with slightly elevated brown apothecial crown, usually with a reddish brown ring around the base of mature apothecia. Parathecium 10 – 60 μm wide, merging with cortex, sometimes with an inter IKI + blue, ca. 8 – 25 μm wide. Hymenium 150 – 230 μm high, paraphyses 1.5 – 2 μm wide, apices slightly widened in terminal brown gel cap, hymenial gel IKI + blue turning red, hemiamyloid. Asci clavate, 90 – 100 × 20 – 30 μm, ascus stain IKI + light blue tholus and space between the outer and inner wall of the ascus before ascospores fill the asci, ascospore several hundred per asci, ellipsoid to narrowly ellipsoid, 4 – 5 (– 6) × (1.5 –) 2 – 3 μm. Subhymenium obscure, 20 – 75 μm thick, IKI + blue or sometimes light blue, with much oil drops. Hypothecium 20 – 25 μm thick, IKI-. Hymenium indistinct. Pycnidia immersed with dark ostioles, ca. 90 × 60 μm, with conidiogenous cells 22 – 28 × 1.5 – 2 μm, conidia rhabditiform, 5 – 6 × 1 μm. Not producing secondary metabolites.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
3C14B6BC00F05D3DBE56136D12EA845E.taxon	description	Fig. 4	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
3C14B6BC00F05D3DBE56136D12EA845E.taxon	diagnosis	Diagnosis. Similar to Trimmatothelopsis mexicana but differing in having dull brown thallus and apothecia, in having smaller apothecial disc (0.1 mm vs. 1 – 2 mm), and in having lower hymenium (120 – 140 μm vs. 200 – 220 μm).	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
3C14B6BC00F05D3DBE56136D12EA845E.taxon	etymology	Etymology. The specific epithet shandongensis refers to Shandong Province, where this species was found.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
3C14B6BC00F05D3DBE56136D12EA845E.taxon	description	Description. Thallus of dispersed or contiguous irregular areoles and subsquamules, 0.25 – 0.75 mm wide, replicating by division. Upper surface dull brown, usually with black undertone, rough, epruinose. Epicortex thin, ca. 5 μm thick. Cortex 30 – 50 μm thick, upper layer brown, ca. 8 – 12 μm thick, lower layer hyaline. Algal layer 50 – 75 μm thick, sometimes interrupted by hyphal bundles, algal cells mostly 8 – 15 μm wide. Medulla obscured with crystals and gelatinization, sometimes interspersed with a few algal cells. Apothecia rare, usually 1 – 2 per areole, immersed, disc up to 0.1 mm wide, concave, blackish brown, slightly darker than thallus, with slightly elevated apothecial crown, sometimes punctiform, epruinose. Parathecium indistinct, ca. 10 – 20 μm wide, merging with cortex, IKI-. Hymenium 120 – 140 μm high, paraphyses ca. 1.5 μm wide, apices unexpanded, lacking pigment caps, hymenial gel IKI + red, hemiamyloid, if IKI too diluted with water on the slide the reaction is IKI- pale yellow. Asci clavate, 95 – 120 × 15 – 25 μm, ascus stain IKI + light blue tholus and space between the outer and inner wall of the ascus before ascospores fill the asci, the blue area in upper layers of the tholus evanescent, ascospores several hundred per asci, narrowly ellipsoid, 5 – 7 × 2 – 3 μm. Subhymenium ca. 20 μm thick, hard to distinguish from hymenium, IKI-. Pycnidia immersed with dark ostioles, subglobose, 90 – 120 × 80 – 100 μm, with conidiogenous cells ca. 20 × 2 μm, conidia bacilliform, 4 – 6 × 1 – 1.5 μm. Not producing secondary metabolites.	en	Wang, Jiaxin, Liang, Fuhui, Zhao, Zuntian, Hu, Ling (2025): Three new taxa of lichen genus Trimmatothelopsis (Acarosporales, Acarosporaceae) from China. MycoKeys 120: 277-293, DOI: 10.3897/mycokeys.120.158033
