Polyporales » Polyporaceae

Megasporoporia

Megasporoporia Ryvarden & J.E. Wright 1982, in Cui, et al., Fungal Diversity 97, 137–392 (2019)

Diagnosis: Basidiocarps annual, resupinate. Pore surface cream, white, pale yellowish to yellowish brown; pores round to angular. Hyphal system dimitic to trimitic; generative hyphae bearing clamp connections; skeletal hyphae strongly dextrinoid and cyanophilous, rarely branched. Dendrohyphidia absent. Hyphal pegs present. Basidiospores cylindrical, hyaline, thin-walled, smooth, IKI–, CB–.

Index Fungorum Number:  IF18028

Type species: Megasporoporia setulosa (Henn.) Rajchenb. 1982, in Cui, et al., Fungal Diversity 97, 137–392 (2019)

Notes: Megasporoporia was established by Ryvarden et al. (1982) based on Poria setulosa Henn. The genus is characterized by resupinate basidiocarps, large or small pores, basidiospores mostly greater than 10 µm in length, a dimitic to trimitic hyphal system with clamped generative hyphae and dextrinoid skeletal hyphae, the presence of rhomboid or bipyramidic crystals, dendrohyphidia, hyphal pegs, mainly occurring on angiosperm branches and causing a white rot (Ryvarden et al. 1982; Dai & Wu 2004; Dai et al. 2004; Cui & Dai 2007; Du & Cui 2009; Li & Cui 2013).

Megasporoporia was treated as a synonym of Dichomitus (Masuka & Ryvarden 1999; Ryvarden 2007). Both genera have a dimitic hyphal system with clamped generative hyphae, hyaline, thin-walled and smooth basidiospores which are negative in Melzer’s reagent and cause a white-rot on hardwood (Dai & Wu 2004). However, Dai & Wu (2004) considered the species with dextrinoid skeletal hyphae, rhomboid or bipyramidic crystals and dendrohyphidia and hyphal pegs to constitute a natural group. Recently, two new genera, Megasporia and Megasporoporiella B.K. Cui, Y.C. Dai & Hai J. Li, were segregated from Megasporoporia based on phylogenetic analysis (Li & Cui 2013).

 

Species:

Megasporoporia bannaensis B.K. Cui & Hai J. Li 2013

Megasporoporia cavernulosa (Berk.) Ryvarden 1982

Megasporoporia cystidiolophora B.K. Cui & Y.C. Dai 2007

Megasporoporia ellipsoidea B.K. Cui & P. Du 2009

Megasporoporia hexagonoides (Speg.) J.E. Wright & Rajchenb. 1982

Megasporoporia inflata Y.C. Dai, Yuan Yuan & Ya.R. Wang 2021

Megasporoporia major (G.Y. Zheng & Z.S. Bi) Y.C. Dai & T.H. Li 2002

Megasporoporia mexicana Ryvarden 1982

Megasporoporia minor B.K. Cui & Hai J. Li 2013

Megasporoporia minuta Y.C. Dai & X.S. Zhou 2008

Megasporoporia neosetulosa C.R.S. Lira & Gibertoni 2021

Megasporoporia quercina Y.C. Dai 2004

Megasporoporia rhododendri Y.C. Dai & Y.L. Wei 2004

Megasporoporia setulosa (Henn.) Rajchenb. 1982

Megasporoporia subcavernulosa Y.C. Dai & Sheng H. Wu 2004

Megasporoporia violacea B.K. Cui & P. Du 2009

 

References:

Cui, B.K., & Dai, Y.C. (2007). Polypores from Tianmushan Nature Reserve in Zhejiang Province (eastern China). Mikol Fitopatol 41:506–514

Cui, B.K., & Li, H.J., & Ji, X., & Zhou, J.L., & Song, J. & Si, J., & Yang, Z.L., & Dai, Y.C. (2019). Species diversity, taxonomy and phylogeny of Polyporaceae (Basidiomycota) in China. Fungal Diversity 97, 137–392

Dai, Y.C., & Wu, S.H. (2004). Megasporoporia (Aphyllophorales, Basidiomycota) in China. Mycotaxon 89, 379–388

Dai, Y.C., & Wei, Y.L., & Wang, Z. (2004). Wood-inhabiting fungi in southern China 2. Polypores from Sichuan Province. Annales Botanici Fennici 41, 319–329

Du, P., & Cui, B.K. (2009). Two new species of Megasporoporia (Polyporales, Basidiomycota) from tropical China. Mycotaxon 110, 131–138

Li, H.J., & Cui, B.K. (2013). Taxonomy and phylogeny of the genus Megasporoporia and its related genera. Mycologia 105, 368–383

Masuka, A., & Ryvarden, L. (1999). Dichomitus in Africa. Mycological Research 103, 1126–1130

Ryvarden L, & Wright, J.E., &, Rachenberg, M. (1982). Megasporoporia a new genus of resupinate polypores. Mycotaxon 16, 172–182

Ryvarden, L. (2007). Studies in Neotropical polypores 23. New and interesting wood-inhabiting fungi from Belize. Synopsis Fungorum 23, 32–50

 

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