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Fungi: Basidiomycota: Agaricomycetes: Polyporales: Polyporaceae: Skeletocutis amorpha (Fr.) Kotl. & Pouzar, 1958

Skeletocutis amorpha – Rusty crust

Synonyms: Agaricus kymatodes, Bjerkandera amorpha, Bjerkandera kymatodes, Bjerkandera mollusca, Coriolus kymatodes, Coriolus subabietinus, Coriolus sublilacinus, Gloeoporus amorphus, Leptoporus amorphus, Leptoporus kymatodes, Polyporus alboaurantius, Polyporus amorphus, Polyporus armeniacus, Polyporus horakii, Polyporus kymatodes, Polyporus molluscus, Polyporus pertenuis, Polyporus pini-glabrae, Polyporus roseoporis, Polystictoides amorphus, Polystictus amorphus, Polystictus kymatodes, Polystictus subabietinus, Polystictus sublilacinus, Poria armeniaca, Trametes armeniaca, Tyromyces amorphus, Tyromyces pini-glabrae.

Common name: rusty crust.

Russian name: Skeletokutis besformennyy.

Extract from Wikipedia article: Skeletocutis amorpha is a species of poroid fungus in the family Polyporaceae, and the type species of the genus Skeletocutis.

AI-generated description

Skeletocutis amorpha is a rare polypore fungus. In St. Petersburg and Leningrad Oblast, it grows on deciduous trees, especially birch and alder. In north-western Russia, it has been found in coniferous and mixed forests, typically on fallen logs or stumps of spruce, fir, and pine. Fruit bodies are annual, resupinate to effused-reflexed, with a smooth to tuberculate hymenial surface and white to cream-colored pores. The fungus is considered a weak parasite or saprotroph, playing a role in wood decomposition.

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

<B>Skeletocutis amorpha</B> mushroom on a spruce stump near Kavgolovskoe Lake north from Toksovo, 8 miles north from Saint Petersburg. Russia, <A HREF="../date-en/2017-04-05.htm">April 5, 2017</A>
LinkSkeletocutis amorpha mushroom on a spruce stump near Kavgolovskoe Lake north from Toksovo, 8 miles north from Saint Petersburg. Russia, April 5, 2017
Location on mapsDachnaya ul., Leningradskaya oblast', Russia, 188664
<B>Skeletocutis amorpha</B> mushrooms on a spruce log near Shchuchye Lake in Komarovo, north-west from Saint Petersburg. Russia, <A HREF="../date-en/2017-04-28.htm">April 28, 2017</A>
LinkSkeletocutis amorpha mushrooms on a spruce log near Shchuchye Lake in Komarovo, north-west from Saint Petersburg. Russia, April 28, 2017
Location on mapsOzyornaya ul., 45, Russia, 197733
<B>Skeletocutis amorpha</B> mushrooms taken from a spruce log near Shchuchye Lake in Komarovo, north-west from Saint Petersburg. Russia, <A HREF="../date-en/2017-04-28.htm">April 28, 2017</A>
LinkSkeletocutis amorpha mushrooms taken from a spruce log near Shchuchye Lake in Komarovo, north-west from Saint Petersburg. Russia, April 28, 2017

AI-generated summary of observations

Skeletocutis amorpha was observed growing on spruce stumps and logs in Leningrad Oblast and north-western Russia. On April 5, 2017, a single mushroom was found on a spruce stump near Kavgolovskoe Lake, approximately 8 miles north of Saint Petersburg. Later, on April 28, 2017, multiple mushrooms were observed on a spruce log near Shchuchye Lake in Komarovo, north-west of Saint Petersburg. The mushrooms were also collected from the same location for further study. These observations suggest that Skeletocutis amorpha is present in the region and can be found growing on decaying spruce wood, particularly in areas with suitable moisture and temperature conditions. The species appears to thrive in these environments, forming multiple fruiting bodies on a single substrate.

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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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