Biology:Trypethelium luteolucidum
| Trypethelium luteolucidum | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Dothideomycetes |
| Order: | Trypetheliales |
| Family: | Trypetheliaceae |
| Genus: | Trypethelium |
| Species: | T. luteolucidum
|
| Binomial name | |
| Trypethelium luteolucidum Aptroot, Mendonça & M.Cáceres (2016)
| |
Trypethelium luteolucidum is a species of lichen in the family Trypetheliaceae,[1] first formally described in 2016. Found in Brazil and Mexico, it is similar to Trypethelium regnellii, but differs by the presence of anthraquinone crystals in the [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].
Taxonomy
Trypethelium luteolucidum was formally described by the lichenologists André Aptroot, Cléverton de Oliveira Mendonça, and Marcela Eugenia da Silva Cáceres in 2016. The type specimen was collected in Porto Velho, Rondônia, Brazil, at an elevation of about 100 m (330 ft), on the bark of Hevea brasiliensis in a plantation.[2]
Description
The thallus of Trypethelium luteolucidum is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], smooth to somewhat [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], somewhat shiny, continuous, covering areas up to 10 cm in diameter and approximately 0.2 mm thick. The thallus is ochraceous in colour, not surrounded by a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and does not induce gall formation on the host bark. Ascomata are spherical, measuring 0.4–0.7 mm in diameter, mostly aggregated in groups of 2–7, and emergent from the thallus in [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] with a decorticated upper surface different from the thallus. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] are distinctly raised above the thallus, irregular in outline, sides almost vertical, up to 5 mm in diameter and 1 mm high, and the same colour as the thallus. The upper surface is whitish [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] or grey to blackish due to the emergent ascomata, and contains crystals inside. The wall is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] and up to 60 μm thick. Ostioles are apical, not fused, flat, and brown. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] with hyaline oil globules. Asci contain eight [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] each. Ascospores are hyaline, contain between 11 and 21 septa, and have a long [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] shape. They measure 60–110 by 12–15 μm, have rounded ends and diamond-shaped [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], and are surrounded by a gelatinous layer up to 2 μm thick. [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] were not observed to occur in this species.[2]
The thallus surface of Trypethelium luteolucidum is mostly UV+ (yellow), and the medulla is K−. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] is UV+ (yellow), and the crystals react K+ (yellow to red). Thin-layer chromatography analysis reveals the presence of lichexanthone and an unidentified anthraquinone.[2]
Habitat and distribution
This species is found on the smooth bark of trees in rainforests and is known from Brazil and Mexico.[2]
References
- ↑ "Trypethelium luteolucidum Aptroot, C. Mendonça & M. Cáceres". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/59FV4.
- ↑ 2.0 2.1 2.2 2.3 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.
Wikidata ☰ Q95575791 entry
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