Fungalpedia – Note 2570, Hyphoderma
Hyphoderma. Wallr.
Citation when using this data: Boonmee S et al. 2021 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Hyphodermataceae, Polyporales, Incertae sedis, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi
Notes: Hyphoderma is one of the largest genera of corticioid fungi, with 105 recognized species (Index Fungorum 2021). All species of Hyphoderma produce white rot and their main habitat is decaying wood of deciduous and coniferous trees. From a morphological point of view, the species included in this genus are characterized by their basidioma, resupinate and effused, with hymenophore smooth, tuberculate or hydnoid; a monomitic hyphal system and the hyphae with clamps; cystidia are frequent; basidia are suburniform to subcylindrical, with two or four sterigmata and basal clamps; spores are subglobose, ellipsoid, cylindrical to allantoid, thin-walled, smooth, with oily contents, and non-amyloid (Larsson 2007). Hyphoderma was described by Wallroth (1833) to accommodate eight species namely Hyphoderma aspera, H. fibrillosa, H. granulosa, H. lintaceum, H. spiculosum, H. sulphurea and H. terrestre. Long time neglected, this genus was recovered and emended by Donk (1949, 1957) who designated H. spiculosum Wallr. [= Hyphoderma setigerum (Fr.) Donk] as the generic type. Parmasto (1968) divided it into three sections i.e., Hyphoderma sect. Hyphoderma, Hyphoderma sect. Stephanocystis, and Hyphoderma sect. Mutatoderma, and, several years after, Eriksson and Ryvarden (1975) recognized twelve groups: Hyphoderma albocremeum– group, H. argillaceum-group, H. capitatum-group, H. cremeoalbum-group, H. guttuliferum-group, H. mutatumgroup, H. orphanellum-group, H. praetermissum-group, H. puberum-group, H. radula-group, H. roseocremeum-group and H. setigerum-group
Hyphoderma setigerum-group was characterized by its cystidia, which are multi-septate, clamped and more or less encrusted (Eriksson and Ryvarden 1975) and was represented by only one species, H. setigerum, widely distributed with great variation in both macro and microscopic characters. Based on molecular, morphological and crossing test analyses, Nilsson et al. (2003) concluded that H. setigerum is a species complex and nine taxa exist inside it. Moreover, a succession of studies (Gilbertson and Blackwell 1988; Wu 1997; Boidin and Gilles 2003; Yurchenko and Wu 2014) described four more species with this type of cystidia: Hyphoderma nudicephalum from Louisiana, USA, Hyphoderma subsetigerum from Taiwan, Hyphoderma bisetigerum from Madagascar, and Hyphoderma pinicola from China.
Type species: Hyphoderma spiculosum Wallr., Fl. crypt. Germ. (Norimbergae) 2: 576 (1833).
Other accepted species: Species Fungorum – search Hyphoderma.
Figure 1 – Hyphoderma australosetigerum (13970MD, MA-Fungi 92235, holotype). a Basidiomata dry specimen. b Hymenophore. c Septate cystidium. d Septate and encrusted cystidium. e Basal hyphae thick-walled, with clamps. f Basidium and probasidia. g Spores. Scale bars: a, b = 5 mm, c–e = 20 μm, f–g = 10 μm.
References
Donk MA 1957 – Notes on Resupinate Hymenomycetes IV. Fungus 27:1–29.
Eriksson J, Ryvarden L 1975 – The Corticiaceae of North Europe, vol 3. Coronicium–Hyphoderma. Fungiflora, Oslo.
Index Fungorum (2021) Index Fungorum. http://www. indexfungorum.org/
Wallroth CFW 1833 – Flora Cryptogamica Germaniae 2: ii-lvi:1–923.
Wu SH 1997 – New species of Hyphoderma from Taiwan. Mycologia 89:132–140.
Entry by
Saranyaphat Boonmee, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
Published online 6 June 2026