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Fungi: Basidiomycota: Agaricomycetes: Agaricales: Cortinariaceae: Cortinarius rubellus Cooke, 1887

Cortinarius rubellus – Deadly webcap

Synonyms: Cortinarius orellanoides, Cortinarius speciosissimus, Cortinarius speciosus, Dermocybe orellanoides.

Common name: deadly webcap.

Russian names: Pautinnik krasiveyshiy, Pautinnik krasnovatyy.

Extract from Wikipedia article: Cortinarius rubellus, commonly known as the deadly webcap, is a species of fungus in the family Cortinariaceae, native to Europe and North America. Within the genus it belongs to a group known as the Orellani, all of which are highly toxic — eating them results in kidney failure, which is often irreversible. The mushroom is generally tan to brown all over.

AI-generated description

Cortinarius rubellus is a small to medium-sized agaric fungus with a reddish-brown cap and yellowish to brown gills. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found in coniferous forests, typically growing under spruce, fir, or pine trees. The fruiting bodies usually appear from late summer to early autumn, often in moist areas with rich soil. The fungus is considered rare and potentially deadly due to its toxicity, containing orellanin, a nephrotoxin that can cause severe kidney damage if ingested.

Photos of this mushroom from the area of St. Petersburg, Russia

Deadly webcap mushrooms (<B>Cortinarius rubellus</B>) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-08-11.htm">August 11, 2017</A>
LinkDeadly webcap mushrooms (Cortinarius rubellus) in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, August 11, 2017
Location on mapsUnnamed Road, Kannelyarvi, Leningradskaya oblast', Russia, 188850
Deadly webcap mushrooms (<B>Cortinarius rubellus</B>) taken from Kannelyarvi, 45 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-08-11.htm">August 11, 2017</A>
LinkDeadly webcap mushrooms (Cortinarius rubellus) taken from Kannelyarvi, 45 miles north from Saint Petersburg. Russia, August 11, 2017
Deadly webcap mushrooms (<B>Cortinarius rubellus</B>) in Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, <A HREF="../date-en/2018-09-04.htm">September 4, 2018</A>
LinkDeadly webcap mushrooms (Cortinarius rubellus) in Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, September 4, 2018
Location on mapsLindulovskaya Doroga, Leningradskaya oblast', Russia

AI-generated summary of observations

In Leningrad Oblast and north-western Russia, Cortinarius rubellus has been observed in various locations. In Kannelyarvi, 45 miles north of Saint Petersburg, the fungus was found on August 11, 2017. Similar observations were made in the same area, with specimens collected for further study. Additionally, the deadly webcap mushrooms were spotted in Lindulovskaya Larch Grove, near Roshchino, approximately 30 miles north-west of Saint Petersburg, on September 4, 2018. These sightings suggest that Cortinarius rubellus is present in the region, particularly in areas with suitable habitats such as larch groves and potentially other types of forests. The observations were made during late summer to early fall, indicating a possible peak activity period for the fungus in this region. The presence of Cortinarius rubellus in these areas highlights the importance of being aware of toxic mushrooms in the region.

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Links

Acknowledgements

Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.

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