Hymenochaetales » Hymenochaetaceae


Cyclomyces Kunze ex Fr. 1830, in Dai, Y.C., Fungal diversity, 45, 131-343 (2010)

Diagnosis: Basidiocarps annual to perennial, mostly pileate, sometimes effused-reflexed, or centrally or laterally stipitate, mostly imbricate. Pilei semicircular to flabelliform or dimidiate. Pileal surface rust-brown to reddish brown, tomentose or trichoderm to finely pubescent. Hymenophore mostly poroid, some lamellate. Context distinctly duplex, lower part dense, separated from the upper tomentum or trichoderm by one or two thin black lines. Hyphal system monomitic, hyphae varying from hyaline and thin-walled to rust-brown and thick-walled, frequently simple septate. Setae frequent, originating from tramal hyphae, subulate, dark brown, thick-walled, distinctly acute. Cystidia infrequent, clavate, thin-walled. Spores ellipsoid to cylindrical, hyaline, thin-walled, IKI, CBor weakly CB+. On angiosperms, causing a white rot. Pantropical genus. The genus as defined here is homogeneous, and it includes lignicolous species having thin and flexible basidiocarps with duplex context, hymenial setae, and small, hyaline and thin-walled spores (not exceeding 5 μm long and 3 μm wide in most species). The hymenial setae of Cyclomyces originate from tramal hyphae rather than subhymenial hyphae, and some of them are occasionally found embedded in trama. Cyclomyces is closely related to Onnia P. Karst. by sharing the duplex context, similar setae, and hyaline, thin-walled spores, but Onnia has thick fruit bodies. In addition, the hyphae of upper context in Onnia are thin-walled, and they are similar to those in lower context. In contrast, trichoderm hyphae in Cyclomyces are distinctly thick-walled, and hence they differ from those in the dense context. Phylloporia has duplex context and monomitic hyphal structure, but it differs from Cyclomyces by its thick-walled, coloured spores and the lack of setae. In addition, species of Phylloporia are parasitic, but they are saprophytic in Cyclomyces. Recently Larsson et al. (2006) demonstrated that Cyclomyces to be inseparable from Hymenochaete according to their phylogenetic study. The phylogeny of the present study support this conclusion, with Cyclomyces, Hymenochaete and Hydnochaete being in the same group Because Cyclomyces is an earlier name than Hymenochaete and Hydnochaete, it is not convenient to transfer all the species of Hymenochaete and Hydnochaete to Cyclomyces because there are more species in Hymenochaete and Hydnochaete rather than Cyclomyces. Dai (2010) prefers to treat species of Cyclomyces independently.

Index Fungorum Number: IF17425

Type species: Cyclomyces fuscus Kunze ex Fr. 1830, in Dai, Y.C., Fungal diversity, 45, 131-343 (2010)


Cyclomyces albidus Lloyd 1920

Cyclomyces australis Krombh. 1831

Cyclomyces beccarianus Ces. 1879

Cyclomyces bresadolae Henn. ex G. Cunn. 1965

Cyclomyces campyloporus (Mont.) Pat. 1900

Cyclomyces cichoriaceus (Berk. ex Fr.) Pat. 1900

Cyclomyces fuscus Kunze ex Fr. 1830

Cyclomyces gigas Chardón 1939

Cyclomyces greenei Berk. 1845

Cyclomyces iodinus (Mont.) Pat. 1903

Cyclomyces isabellinus Lloyd 1924

Cyclomyces javanicus (Pat.) Sacc. & P. Syd. 1899

Cyclomyces lamellatus Y.C. Dai & Niemelä 2003

Cyclomyces leveillei Bondartsev & Singer ex Bondartsev 1953

Cyclomyces maderensis Torrend 1909

Cyclomyces setiporus (Berk.) Pat. 1900

Cyclomyces spathulatus (Hook.) Sacc. 1888

Cyclomyces stereoides Sacc. & Paol. 1888

Cyclomyces tabacinus (Mont.) Pat. 1900

Cyclomyces turbinatus Berk. 1854

Cyclomyces xeranticus (Berk.) Y.C. Dai & Niemelä 1995

Cyclomyces yunnanensis (Lohwag) Bondartsev & Singer 1941



Larsson, K.H., & Parmasto, E., & Fischer, M., & Langer, E., & Nakasone, K.K., & Redhead, S.A. (2006). Hymenochaetales: a molecular phylogeny for the hymenochaetoid clade. Mycologia, 98, 926936.

Dai, Y.C. (2010). Hymenochaetaceae (Basidiomycota) in China. Fungal diversity, 45, 131-343.


About Basidiomycota

The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


Supported by 

Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

(Grant No. DBG6280009)


  • Email: basidio.org@yahoo.com
  • Addresses:
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  • The State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.3 1st Beichen West Rd., Chaoyang District, Beijing 100101, P.R. China

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