Chicitaea yueliangshanensis: a new lichen hidden on bark

A discovery without a large mushroom

Chicitaea yueliangshanensis is a lichenised fungus: a fungus forming a lichen. Wei Wu and Shao-Bin Fu named it in a team paper published on 4 February 2026. Its thin, grey-green to olive-grey thallus adheres closely to bark. The black fruiting discs are small, making the organism easy to overlook on a walk devoted to conspicuous mushrooms.

The MycoKeys article describes two new species and reports a new geographical record of another lichen. Those are three different taxonomic outcomes. A new record for a region is not a species new to science, and the name of one newly described species should not stand in for every organism covered by the paper.

A record tied to a particular collection

Type specimen KUN-L 0095608 comes from Yueliangshan Nature Reserve in Congjiang County, Guizhou Province, China. It was collected on 23 October 2023 at an elevation of 959 metres and deposited in the lichen collection of the Kunming Institute of Botany. The species epithet refers to that type locality.

The description identifies bark as the substrate. This account does not supply a host-tree species that the authors did not establish for the collection. Likewise, one documented collection does not demonstrate that the lichen is endemic to a single reserve. Its distribution remains a question for future surveys, not something that follows automatically from the name's etymology.

Three kinds of evidence

The researchers compared the thallus and fruiting bodies, together with the anatomy of asci and spores. They also used thin-layer chromatography to separate chemical compounds in the thallus, alongside ITS and mitochondrial SSU sequences. These methods address different questions and contribute jointly to the diagnosis.

Against some relatives, the combination of fruiting bodies with an absence of isidia and soredia was informative. Those latter structures are associated with vegetative reproduction. The phylogenetic analysis does not, however, support every branch equally strongly: the authors note weaker support for a particular closest-relative placement. A percentage difference between two sequences is not a universal species threshold.

Reading the illustration

The original figure places the thallus beside anatomical details viewed at higher magnification. Its scale bars have different values: a millimetre-wide fruiting disc and a spore measured in tens of micrometres occupy different scales. The caption therefore matters more than their relative size on a screen.

This example broadens what a fungal observation can be. Looking closely at bark can produce valuable records, yet a confident lichen identification may require laboratory work. A photograph preserves appearance and context. It does not replace measurements, chemical evidence or comparison with the material that anchors a scientific name.