Fungalpedia – Note 2391, Amyloceraceomyces
Amyloceraceomyces S.H. He
Citation when using this data: Yuan HS et al. 2020 – Fungalpedia, Basidiomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Amylocorticiaceae, Amylocorticiales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi
Etymology: Amylo: referring to the amyloidity of the basidiospores; ceraceomyces: a corticioid genus with similar anatomical characters.
Basidiocarp Annual or perennial, resupinate, effuse to slight effuse-reflected, separable, pellicular to membranaceous, stratified. Hymenophore smooth, white, cream to pale yellow; not cracking or sparsely cracking after dry; margin thinning out, fimbriate. Hyphal system monomitic; generative hyphae with clamp connections. Cystidia absent. Basidia clavate to subcylindrical, with a basal clamp connection and four sterigmata. Basidiospores narrowly cylindrical, hyaline, thin-walled, smooth, amyloid, 7–10 × 2–2.5 µm. On angiosperm branch. Rot type unknown.
Notes: Amyloceraceomyces is mainly characterized by the pellicular to membranaceous, stratified basidiocarps, a monomitic hyphal system with nodose septate hyphae, absence of sterile organs, and cylindrical smooth thin-walled amyloid basidiospores. Phylogenetically, Amyloceraceomyces formed a distinct lineage in Amylocorticiales. Morphologically, the genus is almost indistinguishable from Amylocorticium which, however, has ellipsoid to allantoid basidiospores and causes a brown rot mainly on gymnosperm wood (Pouzar 1959; Hjortstam 1980; Gilbertson and Lindsey 1989). Amyloathelia Hjortstam and Ryvarden and Amylocorticiellum Spirin & Zmitr. differ from the new genus by having thick-walled basidiospores (Hjortstam and Ryvarden 1979; Zmitrovich and Spirin 2002). Ceraceomyces Jülich has similar anatomical structures to Amyloceraceomyces, but differs in having basidiospores without reaction in IKI (Bernicchia and Gorjón 2010). Amyloceraceomyces is also similar to Melzericium Hauerslev by sharing smooth, thin-walled amyloid basidiospores and the absence of cystidia, but the latter has stalked basidia and wider basidiospores (3–6 µm, Bernicchia and Gorjón 2010).
Type species: Amyloceraceomyces angustisporus S.H. He.
Other accepted species: Species Fungorum – search Amyloceraceomyces.
Figure 1 – Microscopic structures of Amyloceraceomyces angustisporus (BJFC 021279, holotype). a Basidiospores. b Basidia and basidioles. c Hyphae from subiculum.
References
Bernicchia A, Gorjón SP 2010 – Corticiaceae s.l. Fungi Europaei. Vol 12. Ed Candusso, Italia.
Gilbertson RL, Lindsey JP 1989 – North American species of Amylocorticium (Aphyllophorales, Corticiaceae), a genus of brown rot fungi. Memoirs of the New York Botanical Garden. 49:138–146.
Hjortstam K 1980 – Notes on Corticiaceae (Basidiomycetes) VII. A synopsis of the genus Amylocorticium Pouz. Mycotaxon 11:430–434.
Hjortstam K, Ryvarden L 1979 – Notes on Corticiaceae (Basidiomycetes) V. Mycotaxon 10:201–209.
Pouzar Z 1959 – New genera of higher fungi III. Ceská Mykologie 13:10–19.
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