Astrothelium corallinum
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| Astrothelium corallinum | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Dothideomycetes |
| Order: | Trypetheliales |
| Family: | Trypetheliaceae |
| Genus: | Astrothelium |
| Species: | A. corallinum |
| Binomial name | |
| Astrothelium corallinum Aptroot (2016) | |
Astrothelium corallinum is a species of corticolous (bark-dwelling), crustose lichen in the family Trypetheliaceae. Found in Guyana, it was formally described as a new species in 2016 by André Aptroot. The type specimen was collected from Rain Mountain, southeast of the village in Paruima Mission (Upper Mazaruni District) at an altitude of 500 m (1,600 ft); here, it was found growing on the smooth bark of trees in a rainforest. The lichen has a smooth, somewhat shiny thallus that covers areas of up to 8 cm (3.1 in) in diameter; the entire thallus is surrounded by a thin (0.3 mm) black line that is the prothallus. The whitish parts of the pseudostromata will fluoresce yellow when lit with a long-wavelength UV light; this is due to the presence of lichexanthone, a lichen product. The thallus, however, does not contain lichexanthone, which distinguishes it from the similar species A. ochroleucoides.[1]