Helotiales » Mollisiaceae » Phialocephala

Phialocephala humicola

Phialocephala humicola S.C. Jong & E.E. Davis, Mycologia 64 (6): 1352 (1972)

Index Fungorum number: IF319822         Facesoffungi number: FoF06717


Sexual morph: Undetermined. Asexual morph: Colonies on natural substate effuse, white, velvety. Mycelium mostly immersed, composed ofhyaline, branched, septate and constricted at the septa, guttulate hyphae,1.5–3 μm wide. Condiophores up to 300 μm long, 5–7 μm wide at base, 3.5–4.5 μm wide at tip, macronematous, mononematous, erect, straight or broadly curved, subcylindrical, wider at base, septate, median brown, thick-walled, branched at the apex. Conidiogenous cells phialidic, discrete, determinate, terminal, clustered at the apex of conidiophores, hyaline, thin-walled, cylindrial, with inconspicuous openings, with minute collarettes. Conidia 2.5–4 μm long, 2–3.5 μm at widest (= 3.5 × 2.5 μm, n = 30), acrogenous, aggregated in slimy and white masses, acrogenous,solitary to catenate, hyaline, cuneate, rhomboid or shield-shaped, asepate, smooth.


Culture characteristics: Conidia germinated within 48h. Germ tubes produced from one angle. Mycelia superficial, decumbent, irregular, with entire edge, yellowish brown at center, pale brown at circumference from above.


Habitat: Saprobic on decaying wood.


Known hosts: Decayed tree, soil (Kiyuna et al. 2012), Decaying wood (Hyde et al. 2020).


Known distribution: Japan, Tokyo, USA, New Jersey (Kiyuna et al. 2012), China, Guizhou (Jie et al. 2013), Thailand, Phrae (Hyde et al. 2020).


Material examined: Thailand, Phayao Province, Muang District, on dead branch of Mangifera indica (Anacardiaceae), 12 March 2012, M. Doilom (MFLU 19–1562, new host record), living culture (MFLUCC 12–0380).


GenBank Accession No: ITS: MN999924, LSU: MN901120, SSU: MN901150.


Notes: Jong and Davis (1972) introduced Phialocephala humicola from a soil sample collected from Cape May, New Jersey, USA. Subsequently, this species was isolated from soil in Japan (Matsushima 1975), USA (Ellis 1976), China (Matsushima 1980) and Australia (Matsushima 1989). Matsushima (1975) reported P. humicolaon Quercus sp. in Nara City, Japan, and Matsushima (1980) found this species on leaves of Areca catechuin Taiwan, China. Our collection differs from P. humicola (ATCC 22801) in having cuneate, rhomboid or shield-shaped conidia, while the latter has ellipsoidal conidia, but the phylogenetic analysis of combined LSU and ITS sequence data confirmed that our collection is P. humicola. This is new geographical record of P. humicola in Thailand.



Figure  Phialocephala humicola (MFLU 19–2852, new geogrophical record). a, b Conidiophores and conidia. c, d Conidiogenous cells and conidia. e, f Conidia. g Colonyon PDA media. Scale bar: a = 20 μm, b = 30 μm, c = 5 μm, d, e, f = 3 μm.


Reference: Hyde KD, de Silva NI, Jeewon R, Bhat DJ, et al. (2020) AJOM new records and collections of fungi: 1–100. Asain Journal of Mycology 3(1):22–294.








About GMS Microfungi

The webpage gmsmicrofungi.org provides an account of GMS microfungi.


Supported by 

Thailand Science Research and Innovation (TSRI),

project entitled:

"The future of specialist fungi in a changing climate: baseline data for generalist and specialist fungi associated with ants Rhododendron species and Dracaena species"

(Grant No. DBG6080013)

"Impact of climate change on fungal diversity and biogeography in the Greater Mekong Sub-region"

(Grant No. RDG6130001)


  • Email:
  • Addresses:
    1 Center of Excellence in Fungal Research
  • Mae Fah Luang University Chiang Rai
    57100 Thailand
  • 2 Kunming Institute of Botany
  • Chinese Academy of Sciences,
  • Honghe County 654400, Yunnan, China

Published by the Mushroom Research Foundation 
Copyright © The copyright belongs to the Mushroom Research Foundation. All Rights Reserved.