Astrothelium leucothelium Nyl.



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY-SA4.0
[ABL60477], Costa Rica, Prov. Guanacaste, Volcán Tenorio National Park, 25 km NNW of Tilarán, 84°59’ W, 10°43’ N, 700 m. On tree in meadow along access road to station near Bijagua. Leg. A. Aptroot (no. 60477), 15.03.2004, det. A. Aptroot 2004
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY-SA4.0
[ABL60477], Costa Rica, Prov. Guanacaste, Volcán Tenorio National Park, 25 km NNW of Tilarán, 84°59’ W, 10°43’ N, 700 m. On tree in meadow along access road to station near Bijagua. Leg. A. Aptroot (no. 60477), 15.03.2004, det. A. Aptroot 2004
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY SA 4.0
[ABL78465], Brazil, Santa Catarina, Joinville, Recanto das Nascentes Divinas, in Atlantic rain forest on tree bark. 225 m, 26°12’43’’ S, 49°00’11’’ W. Leg. A. Aptroot (no 78465), 29.03.2019, det. A. Aptroot, 2019.
Thallus corticate, greenish grey. Ascomata several chambers joined with eccentric, fused ostioles. Hamathecium clear. Spores 8/ascus, 3(–5) septate 32–52 ×10–17 μm, hyaline, IKI-. Chemistry Thallus and ascomata UV+ yellow, K-, TLC: lichexanthone



Felix Schumm - CC BY-SA 4.0
[ABL50168], Brazil, Sena Madureira, Reserva extratevista Cazumbá- Iracema, Núcleo Cazumbá, on tree bark in disturbed tropical rain forest. 09°07’ E, 68°57’ W, 150 m. Leg. A. Aptroot (no 50168), M. Cáceres & J. Cavalcante, 9.04.2019. Det. A. Aptroot. 2019.



Felix Schumm - CC BY-SA 4.0
[ABL50168], Brazil, Sena Madureira, Reserva extratevista Cazumbá- Iracema, Núcleo Cazumbá, on tree bark in disturbed tropical rain forest. 09°07’ E, 68°57’ W, 150 m. Leg. A. Aptroot (no 50168), M. Cáceres & J. Cavalcante, 9.04.2019. Det. A. Aptroot. 2019.