Dimidiographa
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| Dimidiographa | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Arthoniomycetes |
| Order: | Arthoniales |
| Family: | Roccellographaceae |
| Genus: | Dimidiographa Ertz & Tehler (2011) |
| Type species | |
| Dimidiographa loandensis (Nyl.) Ertz & Tehler (2011) | |
| Species | |
Dimidiographa is a genus of lichen-forming fungi in the family Roccellographaceae. It has three species of crustose lichens,[1][2] with Dimidiographa loandensis serving as the type species.
Following a molecular phylogenetic-based reorganization of the order Arthoniales, lichenologists Damien Ertz and Anders Tehler circumscribed Dimidiographa in 2011, with D. loandensis assigned as the type species. The genus name is derived from the distinctive dimidiate excipulum. Dimidiographa is reminiscent of the genus Opegrapha, but it can be distinguished mainly by its unique dimidiate excipulum (where the lateral parts of the excipulum are carbonized, meaning they are dark brown to black and hardened, while the hypothecium, which is the layer beneath the excipulum, remains pale) and the ascospore septation pattern. Among the other genera in the Roccellographaceae, Dimidiographa stands out due to its carbonized excipulum. All three species of Dimidiographa were originally described in the genus Opegrapha.[3]