Английская Википедия:Astrothelium sipmanii
Шаблон:Short description Шаблон:Speciesbox
Astrothelium sipmanii is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. It is found in Guyana.
Taxonomy
The lichens was formally described as a new species in 2016 by Dutch lichenologist André Aptroot. The type was collected by Harrie Sipman in the Upper Takutu District; here, in savannah forest, it was found growing on the smooth bark of trees. The species epithet acknowledges the collector of the type.[1]
Description
The lichen has a pale ochraceous-green thallus with a cortex; the thallus is surrounded by a thin (≤1 mm wide) black prothallus. The ascomata are pear-shaped (pyriform), measuring 0.7–1.2 mm in diameter. The ascomatal walls are carbonized (blackened) and up to about 80 µm thick; the ostioles (pores) are apically situated, black, and concave. Astrothelium sipmanii makes ellipsoid-shaped ascospores with 5 septa, and measure 100–150 by 35–40 µm. The hamathecium (i.e., all of the hyphae or other tissues between the asci) is Шаблон:Lichengloss (scattered with) with oil globules. No lichen products were detected in the collected specimens using thin-layer chromatography.[1]
Astrothelium curvisporum and A. pustulatum share some similar characteristics, but can be distinguished by differences in spore shape and septation.[1]
References
