Hypocreales » Cordycipitaceae » Beauveria

Beauveria pseudobassiana

Beauveria pseudobassiana S.A. Rehner & Humber, in Rehner, Minnis, Sung, Luangsa-ard, Devotto & Humber, Mycologia 103(5): 1068 (2011)

Index Fungorum number: IF 519125; Facesoffungi number: FoF 13955

Saprobic on adults of Coleoptera. Colony woolly, white, superficial on host body. Mycelium 1.42.4 ( = 1.8, n= 20) µm in wide, hyaline, branched, smooth-walled. Conidiophores micronematous, cylindrical, septate, thin-walled, arising from anastomosing mycelia. Conidiogenous cells 2.54 ( = 3.2, n= 30) µm in diam., aggregated in dense cluster at the apex of conidiophores, forming a globose head, base globose, apex with an indeterminate, geniculate, denticulate rachis. Conidia 1.52.5 ( = 2.1, n= 30) µm in diam., hyaline, globose, aseptate, smooth-walled.

Culture characteristics Colonies on PDA reaching 4.3 cm after 15 days at 20 °C, white, fluffy, circular, margin entire, mycelia loose, reverse creamy yellow.

Material examined China, Yunnan Province, Kunming City, Panlong District, forest near to Songhuaba reservoir, on a coleopteran adult lying on leaf litter, 11 December 2021, De-Ping Wei, SHB1221 (HKAS 102456), living culture KUNCC 21-10509.

Molecular data SSU (OQ127308), ITS (OQ127344), RPB1 (OQ186424)

Notes The DNA-based analysis reveals that our isolate (HKAS 102456) group with the type strain of Beauveria pseudobassiana (ARSEF 3405) with maximum support. Beauveria pseudobassiana was introduced from a larva of Lymantria dispar (Lepidoptera) in the USA by Rehner et al. (2011). This species produces conidiogenous cells with globose base, which apically connects with geniculate, denticulate rachis and broadly ellipsoidal conidia. Our isolate is similar to B. pseudobassiana in all aspects except for the associated host being a coleopteran adult.


Beauveria pseudobassiana (HKAS 102456) o Colonies on hosts. p Close-up of colonies. q Conidial mass. r, s Conidiophores and phialides. t Conidia. Scale bar: q, r = 20 μm, s = 5 μm, t = 3 μm (r, s stained with Congo red solution).


Wei DP, Gentekaki E, Wanasinghe DN, Karunarathna SC, Tang SM, Hyde KD 2022 – Diversity, molecular dating and ancestral characters state reconstruction of entomopathogenic fungi in Hypocreales. Mycosphere 13: 281–351.



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