TY  - JOUR
A1  - Schmitt, Imke
A1  - Otte, Jürgen
A1  - Parnmen, Sittiporn
A1  - Sadowska-Deś, Anna
A1  - Lücking, Robert
A1  - Lumbsch, Helge Thorsten
T1  - A new circumscription of the genus Varicellaria (Pertusariales, Ascomycota)
T2  - MycoKeys
N2  - The lichen-forming genus Pertusaria under its current circumscription is polyphyletic and its phylogenetic affiliations are uncertain. Here we study the species of the genera Pertusaria and Varicellaria which containlecanoric acid as major constituent, have disciform apothecia, strongly amyloid asci, non-amyloid hymenial gel, 1-2-spored asci, and 1- or 2-celled ascospores with thick, 1-layered walls. We infer phylogenetic relationships using maximum likelihood and Bayesian analyses based on four molecular loci (mtSSU, nuLSU rDNA, and the protein-coding, nuclear RPB1 and MCM7 genes). Our results show that the lecanoric acid-containing species form a well-supported, monophyletic group, which is only distantly related to Pertusaria s.str. The phylogenetic position of this clade is unclear, but placement in Pertusaria s.str. is rejected using alternative hypothesis testing. The circumscription of the genus Varicellaria is enlarged to also include species with non-septate ascospores. Seven species are accepted in the genus: Varicellaria culbersonii (Vězda) Schmitt & Lumbsch, comb. nov., Varicellaria hemisphaerica (Flörke) Schmitt & Lumbsch, comb. nov., Varicellaria kasandjeffii (Szatala) Schmitt & Lumbsch, comb. nov., Varicellaria lactea (L.) Schmitt & Lumbsch, comb. nov., Varicellaria philippina (Vain.) Schmitt & Lumbsch, comb. nov., Varicellaria rhodocarpa (Körb.) Th. Fr., and Varicellaria velata (Turner) Schmitt & Lumbsch, comb. nov. A key to the species of Varicellaria is provided.
KW  - Agyriales
KW  - Ascomycota
KW  - lichen-forming fungi
KW  - molecular phylogeny
KW  - Ostropomycetidae
KW  - Pertusaria
KW  - Pertusariales
KW  - taxonomy
Y1  - 2017
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/43889
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-438893
SN  - 1314-4049
SN  - 1314-4057
N1  - Copyright Imke Schmitt et al. This is an open access article distributed under the terms of the Creative Commons Attribution License 3.0 (CC-BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
SP  - 23
EP  - 36
PB  - Pensoft Publishers
CY  - Washington, DC [u. a.]
ER  -