THALLUS olive-brownish, 150-240 x 53-90 µm.
RECEPTACLE (r) triseriate, darker in its lower part, with a dark-coloured foot (f); stalk cell hyaline, elongate. Anterior series of 14-22 receptacle cells gradually become smaller in the upper part. Most of the cells are flattened and have two to four narrow appendiculate cells (ac). Median series of 11-17 receptacle cells; most of them, except for the elongate lowermost cells, are isodiametric. Posterior series of 14-24 receptacle cells are similar to those of the anterior series; a small distal cell bears the conical basal cell of the primary appendage. Each appendage and antheridium are separated from the subtending appendiculate cell by a black basal septum.
APPENDAGE up to 25 µm long.
ANTHERIDIA (an) more numerous than appendages.
PERITHECIUM (p) 68-110 x 28-43 µm; ovate or elongate, only 1/4 free on both sides, darkened, with a short indistinct neck, a small black roundish stump of trichogyne, and a truncate apex.
SPORES (s) elongate, narrow, hyaline.
HOST AND DISTRIBUTION. The specimens of R. peyerimhoffii presented here were hosted by Scaphisoma boreale (Lundblad) (Scaphidiidae). However, the fungus also associates with other species of the genus Scaphispoma (Majewski 1994).
Apart from Poland, R. peyerimhoffii has also been revealed in South Korea, many other countries of Europe, and in North Africa.
Majewski T. 1994. The Laboulbeniales of Poland. Polish Bot. Stud. 7, 3-466.