Astrothelium guianense Aptroot



Felix Schumm - CC BY-SA4.0
[ABL18261], Guyana, upper Mazaruni district. Pakaraim mountains, ca. 2 km NW of Kamarang. On thin stemlet in ca. 10 m tall, well-lit savannah-forest on ridge. 5°53’ N, 60°38’ W, 500 m. Leg. H. Sipman & A. Aptroot (no 18251), 4.2.1985, det A. Aptroot 1990. ISOTYPE.
Thallus corticate, irregular, ascocarps with eccentric fused ostioles, hamathecium not inspersed. Ascospores 4/ascus, hyaline, muriform, 70–80 × 20–25 μm, without gelatinous sheath. Chemistry: UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA4.0
[ABL18261], Guyana, upper Mazaruni district. Pakaraim mountains, ca. 2 km NW of Kamarang. On thin stemlet in ca. 10 m tall, well-lit savannah-forest on ridge. 5°53’ N, 60°38’ W, 500 m. Leg. H. Sipman & A. Aptroot (no 18251), 4.2.1985, det A. Aptroot 1990. ISOTYPE.
Thallus corticate, irregular, ascocarps with eccentric fused ostioles, hamathecium not inspersed. Ascospores 4/ascus, hyaline, muriform, 70–80 × 20–25 μm, without gelatinous sheath. Chemistry: UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA4.0
[ABL18261], Guyana, upper Mazaruni district. Pakaraim mountains, ca. 2 km NW of Kamarang. On thin stemlet in ca. 10 m tall, well-lit savannah-forest on ridge. 5°53’ N, 60°38’ W, 500 m. Leg. H. Sipman & A. Aptroot (no 18251), 4.2.1985, det A. Aptroot 1990. ISOTYPE.
Thallus corticate, irregular, ascocarps with eccentric fused ostioles, hamathecium not inspersed. Ascospores 4/ascus, hyaline, muriform, 70–80 × 20–25 μm, without gelatinous sheath. Chemistry: UV-, K-. TLC: no substances detected.



Felix Schumm - CC BY-SA 4.0
[ABL28316], Brazil, Amazonas, Manaus, Reserva Florestal Ducke, along trails in vicinity of field station. 59°57' W, 2°56' S. In primary rain forest on bark of tree. Leg. M. Cáceres & A. Aptroot (ABL28316.), 3ö8 June 2016, det. A. Aptroot 2016.



Felix Schumm - CC BY-SA 4.0
[ABL28316], Brazil, Amazonas, Manaus, Reserva Florestal Ducke, along trails in vicinity of field station. 59°57' W, 2°56' S. In primary rain forest on bark of tree. Leg. M. Cáceres & A. Aptroot (ABL28316.), 3ö8 June 2016, det. A. Aptroot 2016.