Fungalpedia – Note 3068, Porotheleaceae
Porotheleaceae Murrill.
Citation when using this data: Senanayake IC et al. 2023 – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank.
Classification: Agaricales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi.
The family Porotheleaceae was phylogenetically revised and 14 genera were accepted (Antonín et al. 2019; He et al. 2019; Vizzini et al. 2019; Kalichman et al. 2020; Matheny et al. 2020). These studies indicated that taxonomic placements of some genera are still doubtful. Consiglio et al. (2022) mentioned that there are no obvious morphological or ecological synapomorphies shared by all members of the pale-spored Porotheleaceae s. stricto, with the exception of their lignicolous habit and the presence of clamp connections. Unfortunately, the same situation within the genus Porotheleum is amended by Consiglio et al. (2022). Moreover, their phylogenetic trees (Consiglio et al. 2022, p. 104, 106 and 107), as well as our tree (Fig. 152; Senanayake IC et al. 2023) support that Porotheleum sensu Consiglio et al. contains more genera. All specimens classified by Consiglio et al. (2022) under the genus Porotheleum formed a clade with ML/BI = 72%/0.95 statistical support (Fig. 154; Senanayake IC et al. 2023). We identified several well-separated lineages as, 1) Clitocybula albida (P. albidum), 2) P. dominingense and P. nigripes 3) P. fimbriatum and Porotheleum sp. G0006 4) P. parvulum, 5) Porotheleum sp. PBM4282, and a lineage of 6) Porotheleum omphaliiforme and our new collections (BRNM 552658, BRNM 552721, BRNM 552654).
Porotheleum fimbriatum (Pers.) Fr. is the type species of Porotheleum Fr. Thus, lineage 3) P. fimbriatum and Porotheleum sp. G0006 represents Porotheleum sensu stricto. Clitocybula albida A.K. Dutta, K. Acharya & Antonín clustered with Porotheleum in the phylogenetic analysis of Consiglio et al. (2022). Phylogenetic analysis in this study (Fig.152; Senanayake IC et al. 2023) also showed that, Clitocybula albida and Porotheleum albidum form a separate clade and however, further studies are required to confirm its generic position using additional materials and more genes, since only ITS data for C. albida are available (Dutta et al. 2018). Porotheleum dominingense and P. nigripes form well-separated lineage and clearly represent a new genus, described here as Vizzinia.
Type species: Porotheleum Fr.
Other accepted species: Species Fungorum – search Porotheleaceae.
References
Entry by
Indunil C. Senanayake, Innovative Institute for Plant Health/ Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, Guangdong, China., Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand., Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Science and Oceanography, Shenzhen University, 3688, Nanhai Avenue, Nanshan, Shenzhen, Guangdong 518055, China., University of L’Aquila, Department MeSVA, sect. Environmental Sciences, Via Vetoio, 67100 Coppito (AQ), Italy.
Published online 31 August 2026