Pyrenula infraleucotrypa is a species of corticolous (bark-dwelling) crustose lichen in the family Pyrenulaceae.[1] The species forms a thin glossy crust ranging from yellowish brown to olive green on tree bark and produces cone-shaped fruiting bodies that typically grow in dense groups of 3 to 40, often fusing sideways to form black crusty patches. It is widely distributed across Brazil, having been recorded from 14 states spanning the Amazon basin, northeastern coast, and central parts of the country.
This lichen develops a thin, glossy crust that ranges in color from yellowish brown to olive green and spreads widely without showing a border. It lacks pseudocyphellae. The perithecia (fruiting bodies) are superficial and conical, typically 0.4–0.7mm in diameter, and usually occur in dense groups of three to forty. Adjacent perithecia often fuse sideways to form black, crusty patches, although each retains its own apical opening. Those openings may be black or surrounded by a whitish powdery ring. The hamathecium is clear. Each ascus contains eight ascospores arranged in two uneven rows. The spores have three cross‑walls (septa) and measure 15–18μm long and 5–7μm wide (exceptionally up to 22μm long and 9μm wide). They often have pointed ends, and their internal cavities ( lumina ) are angular or rounded, usually wider than long. A thick inner wall is present at the spore tips. No asexual reproductive bodies or diagnostic secondary metabolite have been reported.[2]
12Aptroot, André; Sipman, Harrie J.M.; Cáceres, Marcela Eugenia da Silva (2013). "Twenty-one new species of Pyrenula from South America, with a note on over-mature ascospores". The Lichenologist. 45 (2): 169–198 [175]. doi:10.1017/S0024282912000734.
↑Aptroot, André; da Silva Cáceres, Marcela Eugenia; dos Santos, Lidiane Alves; Benatti, Michel N.; Canêz, Luciana; Forno, Manuela Dal; Feuerstein, Shirley C.; Vidigal Fraga Junior, Carlos Augusto; Gerlach, Alice C. L.; Gumboski, Emerson Luiz; Jungbluth, Patrícia; Käffer, Márcia I.; Kalb, Klaus; Koch, Natália M.; Lücking, Robert; Torres, Jean-Marc; Spielmann, Adriano A. (2025). "The Brazilian lichen checklist: 4,828 accepted taxa constitute a country-level world record". The Bryologist. 128 (2): 96–423 [287]. doi:10.1639/0007-2745-128.2.96.
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