Fungalpedia – Note 68 Marchandiopsis


Marchandiopsis Ghob.-Nejh. & Hallenb. (Current Name: Marchandiomyces Diederich & D. Hawksw., in Diederich) 


Citation if using this entry: Fallahi et al. (2023) New genera in 2010-2011. Mycosphere (in prep).

Index FungorumFacesoffungi, MycoBankGenBank, Fig 1

Marchandiopsis was introduced by Ghobad-Nejhad et al. (2010) in Corticiaceae (Corticiales). They stated that Laeticorticium quercinum, the sexually reproducing fungus, and Marchandiomyces corallinus as an asexual fungus belonged to the same clade based on the Bayesian analysis of the nuclear LSU sequence data. They considered that these fungi belonged to the same genus, and because the ICBN (McNeill 2007) prohibits the inclusion of a sexual species in a genus that only contains asexual organisms, the new genus Marchandiopsis was suggested, and Marchandiopsis quercina was introduced as the type species. Hawksworth & Henrici (2015) changed the name of Marchandiopsis quercina to Marchandiomyces quercinus based on the International Code of Nomenclature for algae, fungi, and plants (2011). Ghobad-Nejhad et al. (2021) introduced a new combination Marchandiomyces aurantioroseus, by using the phylogenetic analysis of LSU, ITS, IGS, nSSU, and mtSSU sequence data, which included Marchandiomyces quercinus. Marchandiomyces includes bulbil-forming, lichenicolous, and lignicolous species. It is characterized by reddish pink, gelatinous, and small basidiocarps. Marchandiomyces has bisporic basidia, large ellipsoid spores, and a total lack of clamps (Ghobad-Nejhad et al. 2010; Legon & Henrici 2005). 




Fig 1 – Marchandiomyces quercinus. a Basidioma developed on a shoot (Photo credits by Dr. Ghobad-Nejhad, sample no. F119140, herbarium S.); b Probasidia, and basidia. c Spore (redrew from Zmitrovich 2006). Scale bar: b-c= 10 μm


The fungus co-occurs with the ascomata of Colpoma quercinum on Quercus twigs. It is prevalent in northern Europe, Portugal, and Spain (Legon & Henrici 2005).

Type species: Marchandiopsis quercina (J. Erikss. & Ryvarden) Ghob.-Nejh. (Current Name: Marchandiomyces quercinus (J. Erikss. & Ryvarden) D. Hawksw. & A. Henrici)



Ghobad-Nejhad M, Nilsson RH, Hallenberg N. 2010- Phylogeny and taxonomy of the genus Vuilleminia (Basidiomycota) based on molecular and morphological evidence, with new insights into Corticiales. Taxon 59, 1519-1534.

Zmitrovich IV. 2006- Fungi-causative agents of diseases of tree species in the St. Petersburg and its environs. 1. Fungi of oak. News of taxonomy of lower plants 40, 121-131. file:///C:/Users/User/Downloads/griby-vozbuditeli-zabolevaniy-drevesnyh-porod-v-usloviyah-sankt-peterburga-i-ego-okrestnostey-1-mikozy-duba.pdf

Ghobad-Nejhad M, Langer E, Nakasone K, Diederich P, Nilsson RH, Rajchenberg M. Ginns J. 2021- Digging up the roots: taxonomic and phylogenetic disentanglements in Corticiaceae ss (Corticiales, Basidiomycota) and evolution of nutritional modes. Frontiers in Microbiology, p.2320.

Hawksworth DL. Henrici A. 2015- New resting places for Laeticorticium quercinum and Marchandiobasidium aurantiacum. Field Mycology 16, 16-17.

Legon NW. & Henrici A. 2005. Checklist of the British & Irish Basidiomycota. Royal Botanic Gardens, Kew.

McNeill J. 2007- International code of botanical nomenclature (Vienna Code). In the Seventeenth International Botanical Congress Vienna, Austria, July 2005 (Vol. 568).

Entry by

Maryam Fallahi, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.


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