Fuzzy white mold Syzygites megalocarpus covering a rotten mushroom in Alexander Park in Pushkin, suburb of Saint Petersburg. Russia, July 31, 2016Synonyms: Aspergillus bellemontii, Aspergillus maximus, Azygites mougeotii, Hildebrandiella echinocarpa, Mucor aspergillus, Mucor capitatoramosus, Mucor dichotomus, Mucor flavidus, Mucor ramosus, Mucor rufus, Mucor syzygites, Nematogonum fumosum, Nematogonum simplex, Sporodinia argentinensis, Sporodinia aspergillus, Sporodinia bellemontii, Sporodinia dichotoma, Sporodinia flavida, Sporodinia grandis, Sporodinia megalocarpus, Sporodinia pholiotae, Sporodinia rufa, Stilbodendrum nodosum, Stilbum nodosum, Syzygites ampelinus, Syzygites aspergillus, Syzygites echinocarpus, Syzygites grandis.
Russian names: Sizigit velikoplodnyy, Sizigites.
Syzygites megalocarpus is a species of fungus that belongs to the family Syzygitaceae. It is a parasitic fungus that infects insects, particularly flies. In St. Petersburg, Leningrad Oblast, and north-western Russia, Syzygites megalocarpus has been found to be widespread, with a high frequency of occurrence in moist environments, such as forests, bogs, and near water bodies. The fungus typically grows on the bodies of infected insects, forming large, yellowish-brown sporangia that contain spores.
Fuzzy white mold Syzygites megalocarpus covering a rotten mushroom in Alexander Park in Pushkin, suburb of Saint Petersburg. Russia, July 31, 2016
White mold Syzygites megalocarpus(?) covering rotten cap of a brittlegill mushroom in Dibuny, north-west from Saint Petersburg, Russia, August 9, 2016
Mold fungus Syzygites megalocarpus on milkcap or brittlegill mushrooms near Lisiy Nos. West from Saint Petersburg, Russia, August 23, 2017
Mold fungus Syzygites megalocarpus on a brittlegill mushroom Russula(?) near Lisiy Nos, west from Saint Petersburg. Russia, September 6, 2018
Tawny grisette mushroom (Amanita fulva) with web mold fungus Syzygites megalocarpus (Mucorales, Zygomycetes) in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
Close-up of parasitic mold fungus Syzygites megalocarpus (Mucorales, Zygomycetes) on Amanita in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
Tawny grisette mushroom (Amanita fulva) parasitic mold fungus Syzygites megalocarpus in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
Upper view of tawny grisette mushroom (Amanita fulva) with parasitic mold fungus Syzygites megalocarpus in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024
Close-up of tawny grisette mushroom (Amanita fulva) with web mold fungus Syzygites megalocarpus (Mucorales, Zygomycetes) in Tarkhovka Park, west from Saint Petersburg. Russia, August 2, 2024Observations of the fungus Syzygites megalocarpus were made in various locations across Leningrad Oblast and north-western Russia. The mold was found covering rotten mushrooms, including brittlegill and milkcap species, in Alexander Park, Dibuny, and near Lisiy Nos between 2016 and 2018. In Tarkhovka Park, it was observed on tawny grisette mushrooms (Amanita fulva) in 2024, with multiple views of the parasitic mold fungus taken. The fungus appeared as a fuzzy white or web-like mold, often covering the caps of the host mushrooms. The observations suggest that Syzygites megalocarpus is a common parasite of various mushroom species in the region, and can be found in different locations and on different hosts over several years.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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