Oxneriaria supertegens S. Y. Kondr. & Lőkös Acta Bot. Hung.

• Main Authors: Szczepańska, Katarzyna, Kukwa, Martin, Guzow-Krzemińska, Beata, Urbaniak, Jacek
• Format: Other/Unknown Material
• Language: unknown
• Published: 2023
• Subjects: Biodiversity; Taxonomy; Fungi; Ascomycota; Lecanoromycetes; Pertusariales; Megasporaceae; Oxneriaria; Oxneriaria supertegens; Arctic; Canada; Norway
• Online Access: https://zenodo.org/record/7963044; https://doi.org/10.5281/zenodo.7963044

Oxneriaria supertegens (Arnold) S.Y. Kondr. & Lőkös Acta Bot. Hung. 59 (3–4): 358. 2017. ≡ Aspicilia supertegens Arnold, Verh. K. K. Zool. - Bot. Ges. Wien 27: 567. 1877. ≡ Lecanora supertegens (Arnold) Zahlbr., Cat. Lich. Univ. 5: 354. 1928. (Fig. 1D) Thallus lichenized, crustose, thick, usually circular, smooth to irregularly cracked, creamy-white, yellowish-white to greyish-white, matt. Prothallus not visible. Apothecia immersed, 0.5–1.5 mm in diam., thalline margin concolorous with the thallus, thin to thick, disc rounded to irregular, black, flat and matt, sometimes with white pruina. Hymenium colourless, 120–150 μm tall, with submoniliform paraphyses (3–4 globose apical cells), epihymenium green-brown to olive-brown, N+ green intensifying, K+ yellowish brown (Caesiocinerea-green), hypothecium colourless. Asci 8- spored, ascospores hyaline, simple, ellipsoid, 18–24 × 8–15 μm. Conidia filiform, slightly curved, 14–25 × 1 μm. Chemistry: No secondary metabolites were detected in the analysed material. Ecology and distribution: Oxneriaria supertegens is a rare, circumpolar and arctic-alpine species (Thomson 1984), which has been reported from Austria, Finland, France, Germany, Italy, Norway, Portugal, Spain, Sweden and Switzerland (Vitikainen et al. 1997; Llimona & Hladun 2001; Roux 2012; Wirth et al. 2013; Nimis et al. 2018; Westberg et al. 2021; Nimis & Martellos 2022) and from outside Europe from USA and Canada (Thomson 1984; Esslinger 2016). Here, it is reported for the first time from Poland. Three specimens of this species, stored in the KRAM herbarium, were collected in the Tatry Mts in 1987, but remained unidentified. Oxneriaria supertegens prefers specific, very moist habitats, especially siliceous boulders close to mountain brooks and rivers that are frequently sprinkled or periodically flooded with fresh water. Notes: The species most similar to O. supertegens is Aspicilia aquatica (Fr.) Körb. Both taxa occur in similar, humid habitats and have a whitish, smooth to slightly cracked ...