Halegrapha yakushimensis
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| Halegrapha yakushimensis | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Graphidaceae |
| Genus: | Halegrapha |
| Species: | H. yakushimensis |
| Binomial name | |
| Halegrapha yakushimensis M.Nakan., Kashiw. & K.H.Moon (2014) | |
Halegrapha yakushimensis is a species of lichen-forming fungus in the family Graphidaceae.[1] It forms a smooth, greenish-grey crust and produces short, narrow, slit-like fruiting bodies. Unlike most script lichens, it grows primarily over moss rather than directly on bark. The species is known only from montane forest on Yakushima Island in southern Japan.
Halegrapha yakushimensis was described as a new species in 2014 by Minoru Nakanishi, Hiroyuki Kashiwadani and Kwang Hee Moon, based on material collected on Yakushima Island (Kagoshima Prefecture) in southern Japan. The type specimen was collected in March 2012 from the Yodogawa area and is housed in the herbarium of the National Museum of Nature and Science (TNS).[2]
In the protologue, the authors compared the species with Halegrapha chimaera and separated it by the fully carbonized (blackened) excipulum, a clear hymenium lacking granular inclusions (i.e., not inspersed), and muriform (brick-like) spores. They also treated its generic placement as provisional: it was placed in Halegrapha because it combines carbonized exciples, an iodine-positive hymenium, and brown spores, but it differs from other described species of the genus in having spores that do not react with iodine and have small internal chambers (locules) with thickened walls.[2]