Fungalpedia – Note 2401, Rigidoporus
Rigidoporus Murrill
Citation when using this data: Yuan HS et al. 2020 – Fungalpedia, Basidiomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Meripilaceae, Polyporales, Incertae sedis, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi
Rigidoporus was first described by Murrill in 1905. The basionym of its type is Polyporus microporus Fr. This genus is one of the most species-rich genera of basidiomycete wood-decaying saprobes, causing a white rot in deciduous and coniferous tree. Most of the species of Rigidoporus have been described from the Northern Hemisphere (Murrill 1905; Cooke 1949; Corner 1987; Zeng 1992; Ryvarden and Gilbertson 1994; Dai 1998, 2010, 2012; Hattori 2011; Zmitrovich and Malysheva 2014). Recently, multi-gene molecular phylogenies, inferred from ribosomal DNA sequence data, demonstrated the polyphyletic nature of Rigidoporus, and the generic type was nested within a clade in the Hymenochaetales. Moreover, the genus Oxyporus was treated as a synonym of Rigidoporus and most of the Oxyporus species were transferred to Rigidoporus (Wu et al. 2017).
Type species: Rigidoporus micromegas (Mont.) Murrill, Bull. Torrey bot. Club 32(9): 478 (1905).
Other accepted species: Species Fungorum – search Rigidoporus.
Figure 1 – Microscopic structures of Rigidoporus juniperinus (TASM 6139, holotype). a Basidiospores. b Basidia. c Basidioles. d Hymenial cystidia e Cystidioid hyphal ends. f Hyphae from trama. g Hyphae from subiculum.
References
Cooke WB 1949 – Oxyporus nobilissimus and the genus Oxyporus in North America. Mycologia 41:442–455.
Corner EJH 1987 – Ad Polyporaceas IV. The genera Daedalea, Flabellophora, Flavodon, Gloeophyllum, Heteroporus, Irpex, Lenzites, Microporellus, Nigrofomes, Nigroporus, Oxyporus, Paratrichaptum, Rigidoporus, Scenidium, Trichaptum, Vanderbylia, and Steccherinum. Nova Hedwigia 86:1–265.
Dai YC 1998 – Changbai wood-rotting fungi 9. Three new species and other species in Rigidoporus, Skeletocutis and Wolfiporia (Basidiomycota, Aphyllophorales). Ann Bot Fenn 35:143–154.
Dai YC 2010 – Hymenochaetaceae (Basidiomycota) in China. Fungal Divers 45:131–343.
Murrill WA 1905 – The Polyporaceae of North America 12. A synopsis of the white and bright-colored pileate species. Bulletin of the Torrey Botanical Club 32:469–493.
Ryvarden L, Gilbertson RL 1994 – European polypores. Part 2: Synopsis Fungorum. Oslo: Fungiflora, pp 1–355.
Zeng XL 1992 – A undescribed species of Oxyporus (Polyporaceae) from China. Mycotaxon 44:51–54.
Entry by
Hai-Sheng Yuan, CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164, People’s Republic of China, University of the Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
Published online 5 May 2026