Fungalpedia  –Note 21 Chaetomella

Chaetomella Fuckel, (1870)

Citation when using this data: Huanraluek et al. Fungalpedia, coelomycetes, Mycosphere (in press)

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1.

Based on phylogenies of SSU and LSU sequence data, Chaetomella was transferred to Leotiomycetes (Chaetomellaceae Chaetomellales, Leotiomycetes) (Li et al. 2020). The type species is Chaetomella oblonga, and is a coelomycete. Species of this genus are characterized by pycnidial or sporodochial conidiomata with brown, unbranched setae, long, acropleurogenous conidiophores, and hyaline ellipsoid to fusiform or falcate, unicellular conidia (Sutton 1980, Rossman et al. 2004). Chaetomella is saprobic or parasitic on the host plant in terrestrial habitats or has been isolated from soil (Li et al. 2020). This genus is distributed in Australia, Canada, India, Zambia and the USA (Rossman et al. 2004, Crous et al. 2014, 2019).

Chaetomella comprises 60 species that have been recorded in Index Fungorum ( on 10 April 2023) and the sexual morph of this genus is not yet recorded.

Type species: Chaetomella oblonga Fuckel, Jb. nassau. Ver. Naturk. 23–24: 402 (1870) [1869-70]

Fig 1Chaetomella oblonga (redrawn from Rossman et al. 2004) a Vertical section of pycnidium. b Vertical section of sporodochium c Conidiophores, conidiogenous cells. d Conidiomatal setae. e Conidia. Scale bars: a,b=200 μm, c-e=10 μm.


Crous PW, Schumacher RK, Akulov A, Thangavel R, et al. 2019– New and interesting fungi.2. Fungal Systematics and Evolution 3, 57–134.

Crous PW, Quaedvlieg W, Hansen K, Hawksworth DL, et al. 2014– Phacidium and Ceuthospora (Phacidiaceae) are congeneric: taxonomic and nomenclatural implications. International Mycological Association 5, 173–193.

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, et al. 2020– Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100, 279–801.

Rossman AY, Aime MC, Farr DF, Peterson R, et al. 2004– The coelomycetous genera Chaetomella and Pilidium represent a newly discovered lineage of inoperculate discomycetes. Mycological Progress 3, 275–290.

Sutton BC. 1980– The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata. Commonwealth Mycological Institute, Kew, pp 1–696.

Entry by

Naruemon Huanraluek, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand.

(Edited by Kevin D Hyde and Ruvishika S. Jayawardena)

Published online 16 May 2023