Fungalpedia – Note 302, Leptobacillium


Leptobacillium Zare & W. Gams

Citation when using this entry: Perera et al. 2024 (in prep) – Fungalpedia, genera described in 2016. 

Index FungorumFacesoffungiMycoBankGenBank, Fig. 1

Classification: Cordycipitaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Based on LSU sequence data, Zare & Gams (2016) established Leptobacillium to accommodate four verticillium-like species that produce whitish colonies and erect conidiophores. Leptobacillium species are saprotrophic or sometimes fungicolous (Zare & Gams 2016). Species of the genus are characterized by white, greyish white or pinkish white to cream-coloured and woolly colonies on PDA. Reverse of the colony are orange to orange-brown, ochraceous, pale luteous, milky white to dark buff and sometimes diffuse yellow pigment. The asexual morph is hyphomycetous with conidiophores that are primarily long, solitary phialides and rarely irregularly branched. Rod-shaped to slightly fusiform conidia occur in very long, slender chains. Those chains are hardly distinguishable from simple hyphae. The initial conidium is usually shorter, clavate to pyriform, and has a rounded distal end. Chlamydospores are not formed on PDA. Octahedral crystals are usually present. The sexual morph remains undetermined (Zare & Gams 2016). To date there are eight Leptobacillium species have been recorded (Index Fungorum 2023).

Type species: Leptobacillium leptobactrum (W. Gams) Zare & W. Gams

Other accepted species: Species Fungorum – search Leptobacillium.

Figure 1 – Leptobacillium leptobactrum (a: CBS 775.69, b: CBS 145.68). a, b Conidiophores and conidia. Scale bar: a, b = 10 μm. Redrawn from Zare & Gams (2016).



Zare R, Gams W. 2016 – More white verticillium-like anamorphs with erect conidiophores. Mycological Progress 15, 993–1030.


Entry by


Rekhani Hansika Perera, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand.


(Edited by Kevin D. Hyde, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)


Published online 8 July 2024