What You Should Know
Syzygospora mycetophila is considered parasitic on the cap, gills, or stem of Gymnopus dryophilus. The fruit bodies are composed of the infected mushroom’s tissue that looks like a jelly brain.
There are also other species of Syzygospora which parasitize and give galls on the same Collybia, such as S. effibulata, S. norvegica and S. tumefaciens. They are differentiated only by microscopy. Thus, S. mycetophila is a collective species.
S. tumefaciens has also been reported by Guzmán & Dávalos (1979) as a gall-forming parasite on Rhodocollybia butyracea in Mexico.
Other names: Collybia Jelly, Collybiagalzwam (Netherlands), Rôsolovka Hubomilná (Slovakia).
Syzygospora mycetophila Mushroom Identification
The carpel is 10–30 mm wide, cerebrally lobed, whitish, yellowish to ocher brown, often pinkish.
Flesh and Smell
The flesh is soft jelly-like. The smell is indistinct.
Two types: a) subglobose to broadly ellipsoid blastoconidia, laterally arising or terminal on conidiophores, 2-4 x 1.5-2.5 µm; b) arthroconia 7-13 x 1.5-2 µm.
Parasitic on Gymnopus dryophilus, which grows in just about any kind of woods, at just about any time, and is widely distributed.
Spores 6-9 x 1.5-2.3 µ; elliptical to cylindrical. Basidia 4-sterigmate. Clamp connections present.
Syzygospora mycetophila Synonyms
Exobasidium mycetophila (Peck) Burt, Bull. Torrey bot. Club: 53 (1901)
Carcinomyces mycetophilus (Peck) Oberw. & Bandoni, Nordic Journal of Botany 2 (5): 509 (1982)
Christiansenia mycetophila (Peck) Ginns & Sunhede, Botaniska Notiser 131: 168 (1978)
Christiansenia mycetophila var. bispora F. Rath
Exobasidium mycetophila (Peck) Burt
Syzygospora mycetophila var. mycetophila (Peck) Ginns: 629 (1986)
Tremella mycetophila Peck
Photo 1 - Author: Keith Seifert (Creative Commons Attribution-Share Alike 4.0 International)
Photo 2 - Author: Fluff Berger (Creative Commons Attribution-Share Alike 4.0 International)
Photo 3 - Author: Fluff Berger (Creative Commons Attribution-Share Alike 4.0 International)
Photo 4 - Author: Keith Seifert (Creative Commons Attribution-Share Alike 4.0 International)
Photo 5 - Author: Fluff Berger (Creative Commons Attribution-Share Alike 4.0 International)