Spirographa fusisporella (Nyl.) Zahlbr. s.l.

Commensal lichenicolous fungus.

     Species visible only by its ascomata having the appearance of perithecia or apothecia depending on their stage of development, immersed in the thallus of the host then slightly superficial, more or less ovoid in shape with the upper part more pigmented than the lower part , blackish-brown, 80-200 µm in diameter, opening by a pore revealing the brownish disc. Asci clavate, elongated and more or less cylindrical, 47-55 x 9-12 µm according to the literature, 35-45 x 13-18 µm according to our measurements, containing 16-32 spores arranged in spirals. Ascospores acicular, hyaline, more or less helix, 1-septate, 22-31 x 1-2.5 µm according to the literature, 25-30 x 2-3 according to our measurements. Commensal species (?) of the thallus and apothecia of many species of lichens of the genera: Lecanora, Ochrolechia, Parmelina, Pertusaria, Rinodina, etc... This extraordinary variety of hosts has given rise to an equally extraordinary synonymy... Some authors thinking that there would be more specific taxa of their host but this remains to be studied.