Heteroradulum labyrinthinum (H.S. Yuan & C. Decock) L.W. Zhou, 2022

Li, Qian-Zhu, Liu, Shi-Liang, Wang, Xue-Wei, May, Tom W. & Zhou, Li-Wei, 2022, Redelimitation of Heteroradulum (Auriculariales, Basidiomycota) with H. australiense sp. nov., MycoKeys 86, pp. 87-101 : 87

Heteroradulum labyrinthinum (H.S. Yuan & C. Decock) L.W. Zhou comb. nov.

Basionym.

Grammatus labyrinthinus H.S. Yuan & Decock, in Yuan, Lu & Decock, MycoKeys 35: 32 (2018)

Remarks.

Heteroradulum labyrinthinum was placed in the new genus Grammatus as the generic type ( Yuan et al. 2018). The main reason for introducing Grammatus was its irregularly irpicoid to poroid hymenophores, from a morphological perspective ( Yuan et al. 2018). However, the morphological difference of hymenophores is not a reliable taxonomic character at the generic level within the Auriculariales . For example, Protomerulius Möller was recently shown to accommodate species with various kinds of hymenophore ( Spirin et al. 2019a). This phenomenon also occurs in other groups of wood-inhabiting fungi ( Wang et al. 2021). Moreover, taking the current phylogenetic evidence into consideration (Figure 1 ), we propose to treat Grammatus as a later synonym of Heteroradulum . Therefore, G. labyrinthinus is transferred to Heteroradulum , and Heteroradulum semis , that was moved to Grammatus ( Yuan et al. 2018), is reaccepted as a member of Heteroradulum .

Species excluded from Heteroradulum

Figures

Figure 1. Phylogenetic delimitation of Heteroradulum within the Auriculariales inferred from the combined dataset of ITS and nLSU regions. The topology generated by the maximum likelihood analysis is presented along with bootstrap values and Bayesian posterior probabilities above 50 % and 0.8, respectively, at the nodes. The specimens of the newly described species are in boldface.