Lendemeriella exsecuta
species of lichen
Lendemeriella exsecuta is a species of saxicolous (rock-dwelling) crustose lichen in the family Teloschistaceae. First described in 1880, it has a grey, crust-like body with small disc-shaped fruiting structures that range from brownish-yellow to black. The species has a circumpolar distribution, inhabiting Arctic and alpine environments from the European Alps to Antarctica, where it grows on silica-rich rocks in sheltered, humid locations.
Taxonomy
The species was first described in 1880 by the Finnish lichenologist William Nylander, who classified it as a member of the genus Lecanora. After having been shuffled to various genera in its taxonomic history, Sergey Kondratyuk transferred it to the genus Lendemeriella in 2020.
Description
Lendemeriella exsecuta is a crustose lichen, meaning it grows as a thin, crust-like layer tightly attached to its substrate. The main body (thallus) appears grey, occasionally dark grey or off-white, and forms a continuous surface that may develop small cracks creating distinct segments called areoles. These areoles measure 0.5–1 mm across and may appear slightly pinched at their base.
The reproductive structures (apothecia) are small disc-like organs measuring 0.2–0.7 mm in diameter. These sit directly on the surface without a stalk and display considerable colour variation – from brownish-yellow to orange-brown, eventually becoming completely black.
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This entry incorporates text from “Lendemeriella exsecuta” 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.