Astrothelium novemseptatum
species of lichen
Astrothelium novemseptatum is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. It was first identified in Brazil, and has since been found in Guyana and Colombia. The lichen is characterized by its corticate, smooth, and somewhat shiny thallus, as well as its pyriform ascomata.
Taxonomy
Astrothelium novemseptatum was fornally described as a new species in 2016 by lichenologists André Aptroot and Marcela Cáceres. The type specimen was collected from Rondônia, Porto Velho, at the Parque Natural Municipal de Porto Velho. The species is most similar to Astrothelium eumultiseptatum, but it lacks lichexanthone in the thallus or pseudostroma.
Description
The thallus of Astrothelium novemseptatum is corticate, smooth, somewhat shiny, and continuous, with a pale greenish-grey colour. It covers areas up to 7 cm (2.8 in) in diameter and is approximately 0.2 mm thick. The thallus may or may not have a black prothallus line about 0.3 mm wide. The ascomata are pyriform, with diameters ranging from 0.4 to 0.7 mm.
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This entry incorporates text from “Astrothelium novemseptatum” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.