Polymeridium endoflavens is a species of lichen in the family Trypetheliaceae,[1] first described in 2016. This species is found in Brazil.
| Polymeridium endoflavens | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Dothideomycetes |
| Order: | Trypetheliales |
| Family: | Trypetheliaceae |
| Genus: | Polymeridium |
| Species: | P. endoflavens
|
| Binomial name | |
| Polymeridium endoflavens Aptroot, D.S.Andrade & M.Cáceres (2016)
| |
Taxonomy
editPolymeridium endoflavens was formally described by the lichenologists André Aptroot, Danyelly Santos Andrade, and Marcela Eugenia da Silva Cáceres in 2016. The type specimen was collected in Mata do Junco, Santa Luzia do Itanhy, Sergipe, Brazil, at an elevation of approximately 150 m (490 ft), by the second author.[2]
Description
editThe thallus of Polymeridium endoflavens is not corticate, dull, continuous, covering areas up to 2 cm (3⁄4 in) in diameter, and whitish in colour. It is surrounded by a black prothallus line approximately 0.6 mm wide and does not induce gall formation on the host bark. Ascomata are spherical, measuring 0.25–0.35 mm in diameter, single, and emergent from the thallus. The wall is carbonised and up to 40 μm thick. Ostioles are apical, not fused, flat, and black. The hamathecium is inspersed with yellow oil globules. Asci contain eight ascospores each. Ascospores are hyaline (translucent), 5–7-septate, fusiform, measuring 32–37 by 10–13 μm, with pointed ends and rounded lumina, and are not surrounded by a gelatinous layer. Pycnidia were not observed.[2]
The thallus surface of Polymeridium endoflavens is UV+ (yellow); other lichen spot tests are negative. Thin-layer chromatography analysis reveals the presence of lichexanthone, a lichen product that causes the thallus to fluoresce when lit with a long-wavelength UV light.[2]
Habitat and distribution
editThis species is found on the smooth bark of trees in the Atlantic Forest and is currently known only from Brazil.[2]
References
edit- ^ "Polymeridium endoflavens Aptroot, D.S. Andrade & M. Cáceres". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 22 December 2023.
- ^ a b c d Aptroot, André; Mendonça, Cléverton de Oliveira; Andrade, Danyelly Santos; Silva, Jeanne dos Reis; Martins, Suzana Maria de Azevedo; Gumboski, Emerson; Fraga, Carlos Augusto Vidigal; Cáceres, Marcela Eugenia da Silva (2016). "New Trypetheliaceae from northern and southern Atlantic rainforests in Brazil". The Lichenologist. 48 (6): 713–725. doi:10.1017/s0024282916000037.