Phacellium was described by Bonorden (1861) and currently includes 27 species (Braun 1998, Seifert et al. 2011 or MycoBank). The type species, Ph. alborosellum (Fig. 12) was described from Cerastium holosteoides in France and is characterised by forming synnematous conidiomata that can be hyaline or slightly pigmented. The Phacellium strains in this study cluster within Ramularia (Fig. 1, clade XIV; Fig. 2, clade 64, clade 82) and a new Ramularia species that forms synnemata is described (Fig. 2, clade 76). These results support the hypothesis that, as in Pseudocercospora, synnematous conidiophores is a feature that is unreliable at generic level. Therefore, the genus Phacellium is tentatively synonymised with Ramularia until the exact phylogenetic position of its type species becomes known.