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| | BGBM: lichen keys, CR Sarcographa-Thecaria |
 | | Thalloloma buriticum (Redinger) Staiger - Ascocarps elongate and branched, immersed to slightly raised, 0.1-0.2 mm wide; margins forming a red rim around the exposed, dark red, flat disc; hymenium 60-80 mu, clear, tough; ascospores 8/ascus, transversely septate, I+ pale blue, ca. |
 | | Thalloloma "chroodiscoides" - Ascocarps 2-3 times as long as wide, with rounded ends, immersed, 0.3 mm wide; margins forming a low dark brown rim around the exposed, dark brown, flat disc, surrounded by some, 0.1 mm long, incurved thalloid slips; hymenium 75 mu, clear, soft; ascospores 8/ascus, muriform, ca. |
 | | Thalloloma hypoleptum (Nyl.) Staiger - Ascocarps elongate and branched, immersed, 0.05 mm wide; margins forming a low thalloid rim around the exposed, dark brown, concave disc; hymenium 50-70 mu, clear, tough; ascospores 8/ascus, transversely septate, ca. |
| www.bgbm.fu-berlin.de /sipman/Zschackia/Diorygma/Thalloloma.htm (1300 words) |
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