Fungalpedia – Note 2705, Cylindromonium
Cylindromonium Crous.
Citation when using this data: Meng QF et al. – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification: Nectriaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Cylindromonium was introduced by Crous et al. (2019) based on molecular analysis to accommodate C. eugeniicola, a new species found on leaf litter, along with two lichenicolous species, C. lichenicola and C. rhabdosporum, which were transferred from Acremonium lichenicola and Acremonium rhabdosporum, respectively. These species were found on Parmelia and Cladonia. Subsequently, Crous et al. (2020) added C. alloxyli, a species found on leaves, and Crous et al. (2021, 2023) further expanded the genus with two additional lichenicolous species: C. everniae on Evernia prunastri and C. lichenophilum on Parmelina tiliacea. Most recently, Ohmaki et al. (2023) described C. dirinariae, a lichenicolous species found on Dirinaria applanata. Cylindromonium comprises seven recognized species, five of which are lichenicolous.
This genus is characterized by hyaline, smooth, septate, and branched mycelium. Conidiophores are also hyaline and smooth, appearing either as individual unbranched conidiophores with a terminal phialide or as complex structures with a basal cylindrical cell that produces 2–4 phialides. The basal cell is subcylindrical, hyaline, smooth, and septate. Conidiogenous cells are phialidic, subcylindrical, and tapered apically with a flared collarette. Conidia are solitary or grouped in mucoid packets, cylindrical with obtuse ends, hyaline, smooth, granular, and typically 1-septate at the median (Crous et al. 2019).
Type species: Cylindromonium eugeniicola Crous.
Other accepted species: Species Fungorum – search Cylindromonium.
Figure 1 – Cylindromonium eugeniicola redrawn from Crous et al. (2019). a Conidiophores with conidiogenous cells. b Conidiogenous cells. c Conidia. Scale bars: a, b = 10 μm, c = 5 μm.
References
Crous PW, Wingfield MJ, Lombard L, Roets F et al. 2019 – Fungal Planet description sheets: 951–1041. Persoonia 43, 223–425.
Crous PW, Lombard L, Sandoval-Denis M, Seifert KA et al. 2021a – Fusarium: more than a node or a foot-shaped basal cell. Stud Mycol 98, 100116.
Crous PW, Costa MM, Kandemir H, Vermaas M et al. 2023a – Fungal Planet description sheets: 1550–1613. Persoonia – Molecular Phylogeny and Evolution of Fungi 51 (1), 280–417.
Ohmaki A, Okane I, Crous P, Verkley G. 2023 – Cylindromonium dirinariae sp. nov.(Ascomycota, Hypocreales), a new nectrioid lichenicolous species on Dirinaria applanata in Japan. Fungal Systematics and Evolution 11 (1), 1–10.
Entry by
Meng QF, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand and School of Public Health, Zunyi Medical University, Guizhou 563000, China.
Published online 16 July 2026