L'hamathécium de Stigmidium squamariae, ascomycète lichénicole non lichénisé Conséquences systématiques

Abstract

The hamathecium of Stigmidium squamariae consists of periphyses and short pseudoparaphyses of type b. As a consequence, the S. squamariae-group has to be suspended, and S. squamariae is included in the Stigmidium placynthii-group. Rhizoplaca is reported as a new host genus for S. squamariae (host species: R. peltata).