Английская Википедия:Glyphis frischiana

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Glyphis frischiana is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. It is distinguished by its large Шаблон:Lichengloss, single-spored asci, and the presence of stictic acid as a major metabolite. Found on the trunk of Eucalyptus trees in Cameroon, it is similar in appearance to Glyphis atrofusca but can be distinguished by these key characteristics.

Taxonomy

Glyphis frischiana was first formally described as a new species by German lichenologist Klaus Kalb in 2020. The type specimen was collected in Nkwentang Village, Ndu Subdivision (Donga-Mantung, Northwest Region). It was found on the trunk of a Eucalyptus tree in a small plantation, at Шаблон:Convert above sea level. The specific epithet, frischiana, was chosen to honour Dr. Andreas Frisch, an expert in Ostropales and Arthoniales, who collected the type during his PhD studies.

Glyphis frischiana belongs to the subgenus Pallidoglyphis within the genus Glyphis, along with G. atrofusca and G. substriatula.

Description

The thallus of Glyphis frischiana is corticolous, with a thin, smooth, and Шаблон:Lichengloss surface. It appears dull and is partly Шаблон:Lichengloss, with the Шаблон:Lichengloss densely filled with clusters of crystals. The thallus is approximately 75 μm thick. Ascomata are Шаблон:Lichengloss to sessile, with a thick lateral margin and can be up to 4 mm long and 0.5 mm wide. They are straight, curved, or Шаблон:Lichengloss and may be simple, trifurcate, or irregularly branched. The Шаблон:Lichengloss is black and distinctly visible from above, while the Шаблон:Lichengloss is open and brown to dark brown. The Шаблон:Lichengloss is laterally Шаблон:Lichengloss and hyaline to brownish at the base.

The hymenium is 110–150 μm high and clear, with a Шаблон:Lichengloss, light to dark brownish Шаблон:Lichengloss. The Шаблон:Lichengloss is hyaline, and the paraphyses are thin, surrounded by a thick jelly. Шаблон:Lichengloss are hyaline, becoming very slightly brownish with age, densely Шаблон:Lichengloss, measuring 55–110 by 28–35 μm, and iodine-positive brownish-blue or violet-blue.

Glyphis frischiana contains stictic acid as its major secondary metabolite, with constictic acid and menegazziaic acid present in minor amounts.

Similar species

Although it may easily be confused with a Graphis species, Glyphis frischiana can be distinguished by its brown, potassium hydroxide-negative epithecium and thick-walled paraphyses embedded in a jelly. When compared to Graphis streblocarpa, Glyphis frischiana differs in the absence of a brown Шаблон:Lichengloss, convergent Шаблон:Lichengloss, and a non-visible disc.