Ring-like growth of thin white arachnoid corticioid fungus (mushroom) Athelia arachnoidea(?) killing lichens on a trunk of a maple in Sosnovka Park. Saint Petersburg, Russia, February 3, 2017Synonyms: Athelia bispora, Athelia epiphylla, Corticium arachnoideum, Corticium bisporum, Corticium centrifugum, Fibularhizoctonia carotae, Fusarium kuehnii, Hypochnus bisporus, Rhizoctonia carotae, Terana arachnoidea.
Common name: cobweb duster.
Russian name: Ateliya pautinistaya.
Extract from Wikipedia article: Athelia arachnoidea is a corticioid fungus in the family Atheliaceae. The species forms thin, white, cobwebby basidiocarps (fruit bodies) and typically occurs saprotrophically on leaf litter and fallen wood. It can, however, also be a facultative parasite of lichens and can additionally be a plant pathogen (typically found in its asexual Fibularhizoctonia carotae state), causing "crater rot" of stored carrots.
Athelia arachnoidea is a species of fungus that belongs to the family Atheliaceae. It is characterized by its white to pale yellowish-brown, cottony to arachnoid basidiocarps. In St. Petersburg and Leningrad Oblast, as well as in north-western Russia, Athelia arachnoidea has been found growing on various substrates, including soil, mosses, and decaying plant material, typically in coniferous forests and moist areas. The fungus is relatively common in these regions, particularly during the summer and autumn months, and can form extensive colonies on suitable substrates.
Ring-like growth of thin white arachnoid corticioid fungus (mushroom) Athelia arachnoidea(?) killing lichens on a trunk of a maple in Sosnovka Park. Saint Petersburg, Russia, February 3, 2017
White arachnoid corticioid fungus (mushroom) Athelia arachnoidea parasitizing on lichens on a maple tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 2, 2017
Aptekarskiy pr., 3, Sankt-Peterburg, Russia, 197022
White corticioid fungus (mushroom) Athelia arachnoidea on a maple tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 2, 2017Aptekarskiy pr., 3, Sankt-Peterburg, Russia, 197022Observations of the fungus Athelia arachnoidea in Leningrad Oblast and north-western Russia reveal its distinctive growth patterns and behavior. The fungus exhibits ring-like growth, forming thin white arachnoid structures that can kill lichens on tree trunks, such as those found on maple trees in Sosnovka Park and the Botanic Gardens of Komarov Botanical Institute. In these locations, Athelia arachnoidea was observed parasitizing lichens on maple trees, with sightings recorded in February and April 2017. The fungus's white corticioid growths were also noted on maple trees in the Botanic Gardens, further highlighting its presence in the region. These observations suggest that Athelia arachnoidea is an active and potentially harmful fungus in this area, capable of impacting local lichen populations. Its ring-like growth pattern and parasitic behavior are notable characteristics of this species.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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