Xylographa bjoerkii
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| Xylographa bjoerkii | |
|---|---|
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| Closeup showing the arrangement of ascomata and goniocysts on bare wood; scale: 0.2 mm | |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Baeomycetales |
| Family: | Xylographaceae |
| Genus: | Xylographa |
| Species: | X. bjoerkii |
| Binomial name | |
| Xylographa bjoerkii T.Sprib. (2014) | |
Xylographa bjoerkii is a species of lichen-forming fungus in the family Xylographaceae.[2] It is a wood-dwelling lichen that grows on decaying logs in humid, low-elevation forests of western North America, from British Columbia south to Oregon. The species was described in 2014 and is recognised by its dark, concave fruiting bodies and reduced thallus.
Xylographa bjoerkii was described as a new species in 2014 by Toby Spribille as part of a molecular and morphological revision of the wood-inhabiting lichen-forming genus Xylographa. The species epithet honours Curtis Björk, who collected the original type material used to describe the species. The original description noted that it resembles Xylographa disseminata but differs in having shorter ascospores, a reduced thallus, and confriesiic acid as its main secondary metabolite.[3]
A later multi-gene phylogenetic analysis of Trapeliaceae and Xylographaceae recovered Xylographa bjoerkii as a distinct lineage within Xylographaceae, separate from Xylographa (in the strict sense) and Xyloelixia, and noted that its placement may need further data to resolve.[4]