Arcyria cinerea slime mold on a fallen larch tree in Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, September 4, 2018
Lindulovskaya Doroga, Leningradskaya oblast', Russia, 197729Synonyms: Arcyria albida, Arcyria bicolor, Arcyria cookei, Arcyria digitata, Arcyria friesii, Arcyria leprieurii, Arcyria pallida, Arcyria stricta, Arcyria tenuis, Arcyria trichioides, Clathroides cookei, Clathroides digitatum, Comatricha alba, Lachnobolus arcyrella, Stemonitis cinerea, Stemonitis digitata, Stemonitis glauca, Stemonitis grisea, Trichia cinerea.
Russian name: Artsiriya pepelnaya.
Arcyria cinerea is a species of slime mold that belongs to the class Myxomycetes. It is characterized by its grayish-blue to dark gray sporangia, which are typically 1-3 mm in height and have a powdery, granular appearance on the outside. In St. Petersburg, Leningrad Oblast, and north-western Russia, Arcyria cinerea has been found growing on decaying wood, particularly on coniferous trees such as spruce and fir, as well as on other plant debris in moist, shaded areas. The species is relatively common in these regions, with fruiting bodies often appearing in late summer to early fall.
Arcyria cinerea slime mold on a fallen larch tree in Lindulovskaya Larch Grove, near Roshchino, 30 miles north-west from Saint Petersburg. Russia, September 4, 2018Lindulovskaya Doroga, Leningradskaya oblast', Russia, 197729The observation of Arcyria cinerea in Leningrad Oblast and north-western Russia revealed its presence on a fallen larch tree in Lindulovskaya Larch Grove, near Roshchino, approximately 30 miles north-west of Saint Petersburg. On September 4, 2018, the slime mold was found to be thriving in this specific location. The species was likely drawn to the moist and decaying environment provided by the fallen tree, which offered an ideal substrate for its growth. This sighting suggests that Arcyria cinerea can be found in the region's forests, particularly in areas with abundant organic matter and suitable microclimatic conditions. Further observations may reveal a wider distribution of this species in north-western Russia, highlighting the importance of continued exploration and documentation of the region's myxomycete diversity. The discovery provides valuable insights into the ecological preferences and habitat requirements of Arcyria cinerea.
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