Mariorajchenbergia Gibertoni & C.R.S. Lira, gen. nov.
Index Fungorum number: MB832795; Facesoffungi number: FoF
Etym: – Mariorajchenbergia (Latin), in honor of Mario Rajchenberg, renowned Argentinean mycologist.
Basidiomata annual, resupinate. Pore surface cream, pale yellowish to honey yellow or gray. Pores angular, 1–5 per mm. Hyphal system dimitic with clamped generative hyphae, skeletal hyphae non-dextrinoid to strongly dextrinoid, CB+ (except in M. hubeiensis), moderately to frequently branched. Basidiospores cylindrical to oblong-ellipsoid, ellipsoid in one species, hyaline, thin-walled, smooth, IKI-, CB-. Polyhedric crystals in the subhymenium and hymenium of three species. Hyphal pegs present in three species. Dendrohyphidia present in two species. Causing white rot on angiosperms. So far, known from temperate and subtropical China.
Type species: – Megasporoporia subcavernulosa Y.C. Dai & Sheng H. Wu, Mycotaxon 89: 384. 2004.
Observations: – The description above is updated from Megasporoporiella sensu Li & Cui (2013a), which included M. cavernulosa, M. hubeiensis, M. lacerata, M. pseudocavernulosa, M. rhododendri and M. subcavernulosa.
The dextrinoid reaction may be present or absent in the species of Mariorajchenbergia and the reaction is observable right after the preparation of the slides, as usual for species of Megasporoporia s.lat. Cyanophily should be carefully analyzed, not only in Mariorajchenbergia, to certify that the blue coloration takes place in walls and ornamentations of the microstructures and not in the cytoplasm (Lira et al. 2016).
Species
Megasporoporia subcavernulosa