Halegrapha redonographoides
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| Halegrapha redonographoides | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Halegrapha |
| Species: | H. redonographoides |
| Binomial name | |
| Halegrapha redonographoides J.C.Dantas, Lücking & M.Cáceres (2017) | |
 Type locality: Fazenda Santa Maria da Lage, Brazil | |
Halegrapha redonographoides is a species of bark-dwelling script lichen in the family Graphidaceae.[1] It forms a cream-coloured to beige crust on tree bark and produces curved, slit-like fruiting bodies that are sunken into the thallus surface. The species was described in 2017 from northeastern Brazil, where it occurs in Caatinga dry forest and transitional Cerrado vegetation. It is one of the few members of its genus known to contain norstictic acid.
Halegrapha redonographoides was described as a new species by Jaciele de Oliveira Dantas, Robert Lücking, and Marcela Cáceres. The type material was collected in Brazil (Sergipe state) from tree bark in a Caatinga vegetation remnant at Fazenda Santa Maria da Lage, near Poço Verde, at about 390 m (1,280 ft) elevation.[2]
The authors placed the species in the genus Halegrapha because it combines a pale, crystal-rich, Graphis-like thallus and thick, carbonized lirellae with small brown spores (a "Phaeographis-type" spore form). The epithet redonographoides refers to its Redonographa-like look, especially the somewhat pseudostromatic arrangement of the immersed lirellae, although it differs from Redonographa in being bark-dwelling and in having brown ascospores. In the protologue it was separated from the similar Halegrapha mucronata by its ecorticate thallus, the immersed (pseudostromatic) lirellae, a completely carbonized excipulum, and small, somewhat muriform ascospores. It also contains norstictic acid, a chemistry otherwise reported for only a small number of Halegrapha species.[2]