Polyporales » Polyporaceae » Donkioporiella

Donkioporiella mellea

Donkioporiella mellea L.W. Zhou 2016, in Qin, et al., Cryptogamie, Mycologie, 37(4), 437-447 (2016).

Etymology: mellea (Lat.): referring to the cinnamon-buff to honey-yellow color of the pore surface.

Diagnosis: Basidiocarps perennial, resupinate, sometimes with elevated margins, inseparable from substrate, without odor or taste when fresh, woody, up to 40 cm long, 15 cm wide and 1 cm thick. Pore surface cinnamon-buff to honey-yellow, shining; sterile margin distinct, honey-yellow, up to 3 mm wide. Pores round, 7-9 per mm; dissepiments thick, entire. Subiculum yellowish brown, woody, up to 3 mm thick. tubes cinnamon-buff, woody, up to 7 mm long. hyphal system trimitic; generative hyphae with clamp connections; tissue darkening but otherwise unchanged in KOH. Subiculum: generative hyphae very rare, hyaline, thin-walled, unbranched, 2-3 μm in diam; skeletal hyphae dominant, brown, thick-walled with a narrow lumen to subsolid, occasionally branched, aseptate, loosely interwoven, 2-4 μm in diam; binding hyphae infrequent, hyaline, thick-walled with a narrow lumen to subsolid, frequently branched, 1-2 μm. tubes: generative hyphae very rare, hyaline, thin-walled, unbranched, 1.5-3 μm in diam; skeletal hyphae dominant, yellow, thick-walled with a wide to narrow lumen, occasionally branched, aseptate, interwoven, 1-3 μm in diam; binding hyphae hyaline, thick-walled with a narrow lumen to subsolid, frequently branched, 1-2 μm. hymenium collapsed, cystidia, cystidioles, basidia, basidioles not seen. Basidiospores broadly ellipsoid, pale yellowish to yellow, thick-walled, smooth, inamyloid, indextrinoid, cyanophilous, (4.4-)4.7-5.8(–6) × (3.6-)3.7-4.5(-4.8) μm, L = 5.13 μm, W = 4.08 μm, Q = 1.24-1.28 (n = 90/3).

Index Fungorum Number: IF817114 

Figure 1. Phylogenetic position of Donkioporiella mellea in Polyporales inferred from the nLSU dataset. The topology is from the maximum likelihood analysis with statistical values, respectively, from maximum likelihood and Bayesian inference analyses, if simultaneously above 50% and 0.8, at the nodes.

Figure 2. Phylogenetic relationship of Donkioporiella mellea with other species in the core clade of Polyporales inferred from the ITS dataset. The topology is from the maximum likelihood analysis with statistical values, respectively, from maximum likelihood and Bayesian inference analyses, if simultaneously above 50% and 0.8, at the nodes.