Astrothelium stromatocinnamomeum
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| Astrothelium stromatocinnamomeum | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Dothideomycetes |
| Order: | Trypetheliales |
| Family: | Trypetheliaceae |
| Genus: | Astrothelium |
| Species: | A. stromatocinnamomeum |
| Binomial name | |
| Astrothelium stromatocinnamomeum Aptroot (2022) | |
 Holotype: Santuário do Caraça, Minas Gerais, Brazil | |
Astrothelium stromatocinnamomeum is a corticolous (bark-dwelling) lichen in the family Trypetheliaceae.[1] Described in 2022 from mountainous rainforest in southeastern Brazil, it is characterized by conspicuous orange pseudostromata containing groups of fused ascomata and 3-septate ascospores. The pseudostromata contain an anthraquinone pigment that is absent from the surrounding thallus, and the species is known only from humid forest at Santuário do Caraça in Minas Gerais, Brazil.
Astrothelium stromatocinnamomeum was described in 2022 by André Aptroot from material collected on tree bark in rainforest at Santuário do Caraça, Minas Gerais, Brazil, at an elevation of 1,200 to 1,400 m (3,900 to 4,600 ft). The holotype (Aptroot 52080 & L.A. dos Santos) is deposited in the herbarium of the Instituto de Botânica (ISE), with an isotype (duplicate) in the herbarium of the Federal University of Mato Grosso do Sul (CGMS). Within Astrothelium, it was compared to A. cinnamomeum: both species form orange pseudostromata with 3-septate ascospores, but A. cinnamomeum has pseudostromata that contain only a single group of ascomata, whereas A. stromatocinnamomeum has many groups of fused ascomata in each pseudostroma. The anthraquinone pigment restricted to the pseudostromata and the absence of an inspersed hamathecium further support its recognition as a distinct species.[2]