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- Title
Two new species of Rhizoplaca (Lecanoraceae) from Southwest China.
- Authors
Yanyun Zhang; Yujiao Yin; Lun Wang; Printzen, Christian; Lisong Wang; Xinyu Wang
- Abstract
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.
- Subjects
CHINA; SPECIES; METABOLITES; PHYLOGENY; THALLUS
- Publication
MycoKeys, 2024, Issue 101, p233
- ISSN
1314-4057
- Publication type
Article
- DOI
10.3897/mycokeys.101.115678