Tuesday, September 30, 2025

[Funga • 2025] Agaricus aurantifibrillosus, A. fafuinus & A. shenzhenensis • Three New Species of Agaricus (Agaricales: Agaricaceae) from southern China


[A-B] Agaricus aurantifibrillosus;
[C-D] A. fafuinus;
[E-F] A. shenzhenensis
P.H. Liu & S.E. Wang, 

in Wang, Chen, Huang, Lin et Liu, 2025. 

Abstract
The genus Agaricus is the most species-rich genus within the Agaricaceae, comprising more than 500 species globally. Here, we describe three new species of Agaricus based on morphological and multi-locus (ITS + nrLSU + tef1-α) phylogenetic analyses: Agaricus aurantifibrillosusA. fafuinus and A. shenzhenensisAgaricus aurantifibrillosus and A. fafuinus were collected at Fujian province, while A. shenzhenensis was discovered in Shenzhen City, Guangdong Province. The morphological descriptions of each new species are accompanied by basidiomata photographs, and illustrations of microscopic structures.

Key words: Agaricus, morphology, multi-locus phylogeny, new species, taxonomy

The photographs of fresh basidiomata of Agaricus species in this study.
A. A. aurantifibrillosus (FFAAS 3390); B. A. aurantifibrillosus (FFAAS 3391);
C. A. fafuinus (FFAAS 3393); D. A. fafuinus (FFAAS 3394);
E. A. shenzhenensis (FFAAS 3397); F.  A. shenzhenensis (FFAAS 3398).
Scale bars: 1 cm.

 Agaricus aurantifibrillosus P.H. Liu & S.E. Wang, sp. nov.
 
Etymology. aurantifibrillosus (Latin), referring to the pileus covered with arranged orange (5A8) or brownish yellow (5C8) fibrillose squamules.

 Agaricus fafuinus P.H. Liu & S.E. Wang, sp. nov.
 
Etymology. Derived from the acronym FAFU (Fujian Agriculture and Forestry University), where the type specimens of this species were collected.

 Agaricus shenzhenensis P.H. Liu & S.E. Wang, sp. nov.
 
Etymology. shenzhenensis (Latin), meaning from Shenzhen city where the holotype specimen was collected.


 Shi-en Wang, Si-ang Chen, Hai-chen Huang, Dong-mei Lin and Peng-hu Liu. 2025. Three New Species of Agaricus (Agaricaceae, Agaricales) from southern China. MycoKeys. 119: 47-66. DOI: doi.org/10.3897/mycokeys.119.154278