Grammatus H.S. Yuan & C. Decock

Yuan, Hai-Sheng, Lu, Xu & Decock, Cony, 2018, Molecular and morphological evidence reveal a new genus and species in Auriculariales from tropical China, MycoKeys 35, pp. 27-39: 31

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scientific name

Grammatus H.S. Yuan & C. Decock

gen. nov.

Grammatus H.S. Yuan & C. Decock  gen. nov.


Basidiocarps annual, resupinate; hymenophoral surface hydnoid, irregularly poroid to labyrinthine, hymenium restricted to the area surround the spines or the bottom of the tubes; Hyphal system dimitic; skeletocystidia heavily encrusted in trama; dendrohyphidia thin- to slightly thick-walled; basidia longitudinally septate; basidiospores thin-walled, smooth, oblong-ellipsoid to cylindrical.

Type species.

Grammatus labyrinthinus  H.S. Yuan & C. Decock.


grammatus: referring to the hymenophore striped with raised lines.

Basidiocarps annual, resupinate, coriaceous; hymenophoral surface cream to pale buff, covered by evenly distributed blunt-pointed spines or irregularly irpicoid to subporoid, then developing into labyrinthiform to sinuous pores; hymenium restricted to the area surrounding the spines or the bottom of the tubes. Subiculum very thin. Spine or tubes corky, concolorous with hymenophoral surface, shallow. Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae IKI–, CB+; tissue unchanged in KOH. Skeletocystidia clavate, upper part heavily encrusted. Dendrohyphidia present. Basidia subglobose, longitudinally septate. Basidiospores oblong-ellipsoid to cylindrical, hyaline, thin-walled, smooth, IKI–, CB–.