Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017Synonyms: Basidioradulum radula, Hydnum radula, Hydnum spathulatum, Hyphoderma radula, Radulum corallinum, Radulum epileucum, Radulum orbiculare, Radulum quercinum, Radulum radula, Radulum tomentosum, Sistotrema digitatum, Sistotrema radula, Xylodon digitatus.
Common name: toothed crust.
Russian name: Bazidioradulum skrebkovidnyy.
Xylodon radula is a species of tooth fungus that grows on dead wood. In St. Petersburg and Leningrad Oblast, it has been found on deciduous trees, particularly birch and alder. In north-western Russia, it is commonly encountered in moist forests and along riverbanks, typically fruiting from June to October. The fungus produces small, radially arranged teeth on its underside, which are 0.5-2 mm long and white to cream-colored. It is a relatively rare species in the region, but can be locally abundant in suitable habitats.
Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
Dried toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) on a tree in Sosnovka Park. Saint Petersburg, Russia, March 15, 2017
Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) on willow bark taken from extension of Planernaya Street in northern part of Yuntolovsky Park. Saint Petersburg, Russia, March 21, 2017
Texture of toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) on willow bark taken from extension of Planernaya Street in northern part of Yuntolovsky Park. Saint Petersburg, Russia, March 21, 2017
Toothed crust fungus (Xylodon radula) in area of an old brick factory between Pesochnaya and Dibuny north-west from Saint Petersburg. Russia, March 26, 2017
Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) near Dibuny, north-west from Saint Petersburg. Russia, April 18, 2017
Toothed crust fungus (Xylodon radula) on a side of a small tree stump near a ditch near Dibuny, north-west from Saint Petersburg, Russia, May 5, 2021Observations of Xylodon radula in Leningrad Oblast and north-western Russia reveal its presence in various locations. In Sosnovka Park, Saint Petersburg, the fungus was found on March 13, 15, and 20, 2017, with varying states of dryness. It was also discovered on willow bark in Yuntolovsky Park on March 21, 2017, showcasing its texture. Further sightings occurred near an old brick factory between Pesochnaya and Dibuny on March 26, 2017, and near Dibuny on April 18, 2017. Additionally, the fungus was found on a tree stump near Dibuny on May 5, 2021. These observations suggest that Xylodon radula is present in urban and natural areas of Leningrad Oblast and north-western Russia, with a range of substrates and environments supporting its growth. The fungus appears to be relatively common in the region, with multiple sightings over several years.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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