Fungalpedia – Note 2563, Marasmiellus
Marasmiellus. Murrill.
Citation when using this data: Boonmee S et al. 2021 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Omphalotaceae, Agaricales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi
Notes: Marasmiellus is widely distributed throughout tropical and subtropical areas (Wilson and Desjardin 2005; Kirk et al. 2008). This genus is saprotrophic and rarely grows on living trees. Marasmiellus was previously assigned to Tricholomataceae (Singer 1986) but was later transferred to the Marasmiaceae (Kirk et al. 2008). However, phylogenetic analysis of ITS and nrLSU showed that it belonged to the Omphalotaceae (Moncalvo et al. 2002; Wilson and Desjardin 2005). Marasmiellus is characterized by basidiomes that are marasmioid-collybioid, collybioid-mycenoid or sometimes pleurotoid. Basidiomes are mostly whitish or occasionally grayish, reddish brown or dark brown in colour with ellipsoid basidiospores and hyphae having clamp connections (Singer 1973; Moncalvo et al. 2002). There are more than 400 taxa listed in Species Fungorum (2021) for this genus.
Type species: Marasmiellus juniperinus Murrill, N. Amer. Fl. (New York) 9(4): 243 (1915).
Other accepted species: Species Fungorum – search Collybiopsis.
Figure 1 – Marasmiellus palmivorus (SDBR-CMU-NK076, new record). a Basidiomata. b Basidiospores. c Basidia. d Cheilocystidia. e Caulocystidia. Scale bars: a = 1 cm, b–e = 10 μm.
References
Species Fungorum 2021 – http://www.speciesfungorum.org/
Entry by
Saranyaphat Boonmee, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
Published online 6 June 2026