Entyloma microsporum (Unger) Schröter, 1874
Ranunculus repens, Belgium, prov. Flemish Brabant, Zichem © Carina Van Steenwinkel: the leaf spots are large and swollen gall-like
spores numerous, thick-walled, irregular in shape
Ranunculus repens, Dronten © Arnold Grosscurt
Ranunculus repens, Nieuwendam
the spores are irregular in shape, generally somewhat angular, often very thick-walled; ø 11-13 µm.
Ranunculus repens, Leiden; leg Karel Brussee
Sori as yellowish, hard, swollen, up to 6 mm large pustules. Embedded in the host tissue are dense groups of hyaline spores. Spores irregular, angular in shape; they measure ± 10-19 µm, the wall is thick, 2-5 µm, and consists of two layers
Ranunculaceae, narrowly monophagous
Ranunculus acris, repens.
In the literature prior to the revision by Kruse ao (2018a) the following species are mentioned as host plants; these associations now need further confirmation: R. alpestris, breyninus, bulbosus, carpaticus, chaerophyllos, flammula, lanuginosus, montanus, muricatus, oxyspermus, polyanthemos & subsp. nemorosus, sardous, sceleratus apply to different species.
Protomyces microsporus (Unger) Cooke, 1875.
Ainsworth & Sampson (1950a), Almaraz (1998a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2019a), Kruse, Piątek, Lutz & Thines (2018a), Lutz & Vánky (2009a), Redfern & Shirley (2011a), Savchenko & Heluta (2012a), Scholz & Scholz (2013a), Tóth (1994a), Vanderweyen & Fraiture (2014)a), Vánky (1994a), Vánky & Abbasi (2013a), Vánky, Lutz & Bauer (2008b), Woods, Chater, Smith ao (2018a).