Astrothelium crassum (Fée) Aptroot



Felix Schumm - CC BY-SA 4.0
[Sipman18741], Guyana, upper Mazaruni district, N-slope of mount Roraima. Ca. 25m tall, virgin, mossy forest; 8 m high on 10 cm diam. treetrunk, 5°17’ N, 60°46’ W, 700 m. Leg. H. Sipman (no 18741) & A. Aptroot, 12.-19.02.1985, det. A. Aptroot 1990.
Thallus corticate, olive-green to yellowish brown, rather thick, uneven to bullate. Ascomata several chambers joined with excentric fused, ostioles; joined ascomata dispersed to confluent, 0.3-0.4 mm diam. erumpent, covered by thallus but upper portion whitish and ostiolar area blackish. Hamathecium clear. Ascospores 8/ascus, 3-septate, hyaline, 21–27 × 8–10 μm, IKI-. Chemistry: thallus and pseudostromata UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[Sipman18741], Guyana, upper Mazaruni district, N-slope of mount Roraima. Ca. 25m tall, virgin, mossy forest; 8 m high on 10 cm diam. treetrunk, 5°17’ N, 60°46’ W, 700 m. Leg. H. Sipman (no 18741) & A. Aptroot, 12.-19.02.1985, det. A. Aptroot 1990.
Thallus corticate, olive-green to yellowish brown, rather thick, uneven to bullate. Ascomata several chambers joined with excentric fused, ostioles; joined ascomata dispersed to confluent, 0.3-0.4 mm diam. erumpent, covered by thallus but upper portion whitish and ostiolar area blackish. Hamathecium clear. Ascospores 8/ascus, 3-septate, hyaline, 21–27 × 8–10 μm, IKI-. Chemistry: thallus and pseudostromata UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[Sipman18741], Guyana, upper Mazaruni district, N-slope of mount Roraima. Ca. 25m tall, virgin, mossy forest; 8 m high on 10 cm diam. treetrunk, 5°17’ N, 60°46’ W, 700 m. Leg. H. Sipman (no 18741) & A. Aptroot, 12.-19.02.1985, det. A. Aptroot 1990.
Thallus corticate, olive-green to yellowish brown, rather thick, uneven to bullate. Ascomata several chambers joined with excentric fused, ostioles; joined ascomata dispersed to confluent, 0.3-0.4 mm diam. erumpent, covered by thallus but upper portion whitish and ostiolar area blackish. Hamathecium clear. Ascospores 8/ascus, 3-septate, hyaline, 21–27 × 8–10 μm, IKI-. Chemistry: thallus and pseudostromata UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[Sipman18741], Guyana, upper Mazaruni district, N-slope of mount Roraima. Ca. 25m tall, virgin, mossy forest; 8 m high on 10 cm diam. treetrunk, 5°17’ N, 60°46’ W, 700 m. Leg. H. Sipman (no 18741) & A. Aptroot, 12.-19.02.1985, det. A. Aptroot 1990.
Thallus corticate, olive-green to yellowish brown, rather thick, uneven to bullate. Ascomata several chambers joined with excentric fused, ostioles; joined ascomata dispersed to confluent, 0.3-0.4 mm diam. erumpent, covered by thallus but upper portion whitish and ostiolar area blackish. Hamathecium clear. Ascospores 8/ascus, 3-septate, hyaline, 21–27 × 8–10 μm, IKI-. Chemistry: thallus and pseudostromata UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[Sipman18741], Guyana, upper Mazaruni district, N-slope of mount Roraima. Ca. 25m tall, virgin, mossy forest; 8 m high on 10 cm diam. treetrunk, 5°17’ N, 60°46’ W, 700 m. Leg. H. Sipman (no 18741) & A. Aptroot, 12.-19.02.1985, det. A. Aptroot 1990.
Thallus corticate, olive-green to yellowish brown, rather thick, uneven to bullate. Ascomata several chambers joined with excentric fused, ostioles; joined ascomata dispersed to confluent, 0.3-0.4 mm diam. erumpent, covered by thallus but upper portion whitish and ostiolar area blackish. Hamathecium clear. Ascospores 8/ascus, 3-septate, hyaline, 21–27 × 8–10 μm, IKI-. Chemistry: thallus and pseudostromata UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[Sipman18741], Guyana, upper Mazaruni district, N-slope of mount Roraima. Ca. 25m tall, virgin, mossy forest; 8 m high on 10 cm diam. treetrunk, 5°17’ N, 60°46’ W, 700 m. Leg. H. Sipman (no 18741) & A. Aptroot, 12.-19.02.1985, det. A. Aptroot 1990.
Thallus corticate, olive-green to yellowish brown, rather thick, uneven to bullate. Ascomata several chambers joined with excentric fused, ostioles; joined ascomata dispersed to confluent, 0.3-0.4 mm diam. erumpent, covered by thallus but upper portion whitish and ostiolar area blackish. Hamathecium clear. Ascospores 8/ascus, 3-septate, hyaline, 21–27 × 8–10 μm, IKI-. Chemistry: thallus and pseudostromata UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[ABL11248], Brazil, Rondônia, Porto Velho, Parque Natural Municipal. 8°41'10'' S, 63°52''05' W, 100 m. On tree bark in primary rain forest. Leg. M. Cáceres & A. Aptroot, (no. 11248), 9-12 March 1012, det. A. Aptroot 2012.



Felix Schumm - CC BY-SA 4.0
[ABL11248], Brazil, Rondônia, Porto Velho, Parque Natural Municipal. 8°41'10'' S, 63°52''05' W, 100 m. On tree bark in primary rain forest. Leg. M. Cáceres & A. Aptroot, (no. 11248), 9-12 March 1012, det. A. Aptroot 2012.



Felix Schumm - CC BY-SA 4.0
[ABL11713], Brazil, Rondônia, Estação Ecológica de Cuniã, km 760 on road BR 319 N of Porto Velho. 8°02'44'' S, 63°29'11'' W, 100 m. On tree bark in primary rain forest. Leg. M. Cáceres & A. Aptroot, (no. 11713), 13 March 1012, det. A. Aptroot 2012.



Felix Schumm - CC BY-SA 4.0
[ABL11713], Brazil, Rondônia, Estação Ecológica de Cuniã, km 760 on road BR 319 N of Porto Velho. 8°02'44'' S, 63°29'11'' W, 100 m. On tree bark in primary rain forest. Leg. M. Cáceres & A. Aptroot, (no. 11713), 13 March 1012, det. A. Aptroot 2012.