ORIGINAL ARTICLE
 
KEYWORDS
ABSTRACT
The Biatora vernalis- and meiocarpa-groups comprise species with pale beige to reddish brown apothecia and 0-, rarely also 1(–3)-septate ascospores. A DNA barcoding approach based on ITS sequences shows that these two groups comprise more species and phylogenetic diversity than previously known. Specimens identified as B. vernalis, the type species of the genus, appear to be paraphyletic with regard to B. chrysantha. In addition, there is a morphologically similar species belonging to the B. meiocarpa-group and tentatively named “B. orientalis” in previous publications. Biatora subduplex has for some time been known to comprise specimens from the B. vernalis-, as well as the B. meiocarpa-group. Similar to the situation in B. vernalis, samples from the meiocarpa-clade form several subclades close to B. meiocarpa. Anatomical studies reveal subtle, but recognizable morphological differences between B. subduplex s.str. and the species in the meiocarpa-clade, but not between the subclades. Here, we describe Biatora orientalis as new to science, raise B. meiocarpa var. tacomensis to species rank and provide revised identification keys for the B. vernalis- and B. meiocarpa-groups.
FUNDING
CP gratefully acknowledges financial support for field trips by the Research Council of Norway, the Grolle Olsens Fund and the German Science Foundation. LW, AK and LMs work was supported by the Finnish Ministry of the Environment PUTTE program 2021–2022. The OLICH sequences (OR775002-79) were generated by the Canadian Centre for DNA Barcoding, partly funded by the Norwegian Barcode of Life and the Norwegian Biodiversity Information Centre.
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