Abundisporus

The genus was circumscribed by Norwegian mycologist Leif Ryvarden in 1999, who included the morphological similar fungi Abundisporus roseoalbus, A. violaceus, and the type species, A. fuscopurpureus.[1] Molecular phylogenetic analysis suggests that Abundisporus is monophyletic,[2] and is clustered in the "core polyporoid clade", a phylogenetic grouping of fungi roughly equivalent in composition to the family Polyporaceae.[3][4][5]

Abundisporus has either resupinate (crust-like) or pileate (cap-like) fruit bodies with internal tissue (context) that ranges in colour from pale umber deep purplish brown or greyish to umber brown. Abundisporus has a dimitic hyphal structure with yellow to pale brown skeletal hyphae. Spores produced are pale yellowish, non-dextrinoid, and ellipsoid with slightly thick walls. The tissues of Abundisporus turn brown in potassium hydroxide.[6]

As of June 2017, Index Fungorum accepts seven species of Abundisporus:[7]

• Abundisporus fuscopurpureus (Pers.) Ryvarden (1999)
• Abundisporus mollissimus B.K.Cui, H.Chen & C.L.Zhao (2015)[6]
• Abundisporus pubertatis (Lloyd) Parmasto (2000)[8]
• Abundisporus quercicola Y.C.Dai (2002)[9] – China
• Abundisporus roseoalbus (Jungh.) Ryvarden (1999)
• Abundisporus sclerosetosus Decock & Laurence (2000)[10] – Singapore
• Abundisporus violaceus (Wakef.) Ryvarden (1999)

Abundisporus subflexibilis (Berk. & M.A.Curtis) Parmasto (2000) is now considered to be synonymous with A. roseoalbus.[11]