Corticioid mushroom Trechispora mollusca on the inner side of a completely rotten conk fungus taken from the area of Dibuny - Pesochny near Saint Petersburg. Russia, March 4, 2017Synonyms: Boletus molluscus, Cristella candidissima, Cristella mollusca, Fibuloporia mollusca, Leptoporus molluscus, Physisporus bombycinoides, Physisporus molluscus, Polyporus molluscus, Poria bombycinoides, Poria candidissima, Poria epiphylla, Poria mollusca, Trechispora candidissima.
Russian name: Trekhispora myagkaya.
Trechispora mollusca is a rare, resupinate fungus that grows on decaying wood. In St. Petersburg and Leningrad Oblast, it has been found in forests and parks, typically on coniferous substrates such as spruce and fir. In north-western Russia, it is considered a regionally threatened species due to habitat loss and degradation. Fruit bodies are small, thin, and waxy, with a smooth to slightly wrinkled surface, and a white to cream-colored hymenium. The fungus is typically found in areas with high humidity and moderate temperatures, and its distribution is often associated with old-growth forests and undisturbed woodlands.
Corticioid mushroom Trechispora mollusca on the inner side of a completely rotten conk fungus taken from the area of Dibuny - Pesochny near Saint Petersburg. Russia, March 4, 2017
Corticioid mushroom Trechispora mollusca on the lower surface of true conk fungus in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
Unnamed Road, Sankt-Peterburg, Russia
Soft white corticioid fungus Trechispora mollusca(?) on wood covered by moss in Sosnovka Park. Saint Petersburg, Russia, July 30, 2024Круговая аллея, округ Сосновское, Санкт-Петербург, Северо-Западный федеральный округ, 194064, РоссияObservations of Trechispora mollusca in Leningrad Oblast and north-western Russia reveal its growth patterns on various substrates. The fungus was found on the inner side of a rotten conk fungus near Saint Petersburg, suggesting it can thrive on decaying fungal material. It also grew on the lower surface of a true conk fungus in Sosnovka Park, indicating a preference for shaded, protected areas. Additionally, a possible sighting of T. mollusca was recorded on wood covered by moss in the same park, highlighting its ability to colonize wooden substrates with abundant moisture. These observations span different seasons, from March to July, and demonstrate the fungus's adaptability to various environments in the region. The sightings suggest that Trechispora mollusca is a common species in the area, capable of growing on diverse substrates and in different conditions.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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