Mycoporum elabens (A. Massal.) Flot. ex Nyl. [as 'elabeus'], Act. Soc. linn. Bordeaux 21(4): 417 (1857) .
≡ Rhizocarpon elabens A. Massal., Ric. auton. lich. crost. (Verona): 103 (1852).
Index Fungorum number: IF 395757; Facesoffungi number: FoFxxx, Fig. 1
Saprobic on growing bark of trees or stems. Sexual morph: Ascomata semi immersed to superficial on host surface, simple, visible as dark brown to black circle on host surface. Peridium thick-walled, composed of several layers of dark-brown cells of textura angularis. Hamathecium present, with cellular pseudoparaphyses, anastomosing, branching, embedded in mucilaginous matrix, sometimes aparaphysate, covering asci by gelatinous matrix. Asci bitunicate, fissitunicate, 8-spored, ovoid to saccate, sessile with indistinct ocular chamber, thick-walled. Ascospores bi-to tri-seriated, or overlapping, oblong to cylindrical or ellipsoid, hyaline to subhyaline 1-septate, very slightly constricted at the septum, smooth or rough-walled. Asexual morph: Undetermined.
Material examined: Finland, Etelä-Häme, Tavastia, Asikkala, on dead stem, June 1892, J.P Norrlin (1866) (F216647, holotype).