Marasmius Fr., Fl. Scan.: 339 (1836).
Index Fungorum numbe: IF 18018; MycoBank number: MB 18018
Marasmius is a large genus of plant debris decomposers (Singer 1976a, b, 1986; Antonín and Noordeloos 2010) that is represented by approximately 600 species worldwide (He et al. 2019). The genus was first introduced by Fries (1835) and Marasmius rotula (Scop.). Fr. was later designated as the type species by Singer and Smith (1946). Marasmius is characterized by small or possibly large to robust basidiomata, convex or campanulate, striate to sulcate, white to strongly pigmented pilei, well-developed lamellar, thin and typically tough, cylindrical, often brown or darkly fuscous stipe, white spore print, hyaline, smooth and inamyloid spores and hymeniform pileipellis of smooth or diverticulate cells (Singer 1976a, b, 1986; Antonín 2007). Generic circumscription of Marasmius sensu stricto was restricted (Wilson and Desjardin 2005) and the infrageneric classification has been revised based on the results of a phylogenetic analysis of combined sequences of LSU and ITS incorporated with other notable morphological features (Oliveira et al. 2020b).
Species