| Astrothelium duplicatum | |
|---|---|
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Dothideomycetes |
| Order: | Trypetheliales |
| Family: | Trypetheliaceae |
| Genus: | Astrothelium |
| Species: | A. duplicatum
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| Binomial name | |
| Astrothelium duplicatum
Aptroot & M.Cáceres (2016)
| |
Astrothelium duplicatum is a species of corticolous (bark-dwelling), crustose lichen in the family Trypetheliaceae. [1] Found in Brazil, it was formally described as a new species in 2016 by lichenologists André Aptroot and Marcela Cáceres. The type specimen was collected by the authors in the Parque Natural Municipal de Porto Velho ( Porto Velho, Rondônia), where it was found growing on the smooth bark of a tree in a park near a rainforest, and on tree twigs in the forest. The lichen has a smooth and somewhat shiny, olive-green thallus surrounded by a black prothallus (about 0.3 mm wide) and covers areas of up to 5 cm (2 in) in diameter. The presence of the lichen does not induce the formation of galls in its host. The ascomata are roughly spherical ( globose) and typically aggregate in groups of about five to fifty, usually immersed in the bark tissue as pseudostromata. Its ascospores are hyaline, spindle-shaped ( fusiform) and measure 45–55 by 11–15 μm. The use of thin-layer chromatography on collected lichen samples revealed the presence of an anthraquinone compound, possibly parietin. [2] The characteristics that distinguish Astrothelium duplicatum from other members of Astrothelium include the internal, yellow pigment of its ascomata; and the dimensions of its ascospores, which are about 3–4 times as long as they are broad. [3] Astrothelium mesoduplex is similar in appearance, but that species lacks yellow to orange pseudostromata and has shorter ascospores. [2]
References
- ^ "Astrothelium duplicatum Aptroot & M. Cáceres". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 6 November 2022.
- ^ a b Aptroot, André; Cáceres, Marcela Eugenia da Silva (2016). "New Trypetheliaceae from the Amazon basin in Rondônia (Brazil), the centre of diversity of the genus Astrothelium". The Lichenologist. 48 (6): 693–712. doi: 10.1017/s0024282915000584. S2CID 89013757.
- ^ Aptroot, André; Lücking, Robert (2016). "A revisionary synopsis of the Trypetheliaceae (Ascomycota: Trypetheliales)". The Lichenologist. 48 (6): 763–982. doi: 10.1017/s0024282916000487. S2CID 89119724.
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