Two new species of Rhizoplaca (Lecanoraceae) from Southwest China
- Author:
- Zhang Y., Yin Y., Wang L., Printzen C., Wang L. & Wang X.
- Year:
- 2024
- Journal:
- MycoKeys
- Pages:
- 101: 233–248
- Url:
- https://doi.org/10.3897/mycokeys.101.115678
In this study, two new species, Rhizoplaca adpressa Y. Y. Zhang & Li S. Wang and R. auriculata Y. Y. Zhang, Li S. Wang & Printzen, are described from Southwest China, based on their morphology, phylogeny and chemistry. In phylogeny, the two new species are monophyletic, and sister to each other within Rhizoplaca chrysoleuca-complex. Rhizoplaca adpressa is characterized by its placodioid and closely adnate thallus, pale green and heavily pruinose upper surface, narrow (ca. 1 mm) and white free margin on the lower surface of marginal squamules, the absence of a lower cortex, and its basally non-constricted apothecia with orange discs that turn reddish-brown at maturity. Rhizoplaca auriculata is characterized by its squamulose to placodioid thallus, yellowish green and marginally pruinose squamules, wide (1−3 mm) and bluish-black free margin on the lower surface of marginal squamules, the absence of a lower cortex, and its basally constricted apothecia with persistently orange discs. Rhizoplaca adpressa and R. auriculata share the same secondary metabolites of usnic and placodiolic acids.
Key words: new taxa, Rhizoplaca chrysoleuca-complex, R. melanophthalma-complex, saxicolous lichen.
- Id:
- 36216
- Submitter:
- zpalice
- Post_time:
- Friday, 26 January 2024 10:00