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Gyalectoid Pertusaria species form a sister-clade to Coccotrema (Ostropomycetidae, Ascomycota) and comprise the new lichen genus Gyalectaria

2010; Taylor & Francis; Volume: 1; Issue: 1 Linguagem: Inglês

10.1080/21501201003631540

2150-1211

Imke Schmitt, Johnathon D. Fankhauser, Katarina Sweeney, Toby Spribille, Klaus Kalb, H. Thorsten Lumbsch,

Botany and Plant Ecology Studies

The phylogeny and taxonomic placement of three species currently placed in the genus Pertusaria with gyalectoid ascomata were studied using maximum likelihood and Bayesian analysis of four molecular loci (mitochondrial SSU, nuclear LSU rDNA and the protein-coding, nuclear RPB1 and MCM7 genes). A total of 40 new sequences were generated for this study and aligned with 84 sequences retrieved from Genbank. Our results show that the gyalectoid Pertusaria species are only distantly related to Pertusaria s.str. They form a strongly supported sister-group relationship to Coccotrema. Consequently, the new genus Gyalectaria Schmitt, Kalb & Lumbsch is described in Coccotremataceae to accommodate these species and the new combinations G. diluta (C. Björk, G. Thor & T. Wheeler) Schmitt, T. Sprib. & Lumbsch, G. gyalectoides (Vezda) Schmitt, Kalb & Lumbsch, and G. jamesii (Kantvilas) Schmitt, Kalb & Lumbsch are proposed. The order Pertusariales is reduced to synonymy with Agyriales.