Taphrina sadebeckii Johanson, 1886

on Alnus

Taphrina sadebeckii: galls on Alnus glutinosa

Alnus glutinosa, Naardermeer

Taphrina sadebeckii: galls on Alnus glutinosa

Alnus glutinosa, Leiden

Taphrina sadebeckii gall

Alnus glutinosa, Nieuwendam; upper side of the leaf

Taphrina sadebeckii gall

underside

Taphrina sadebeckii hymenium

asci, strong magnification (lighted from below)

Taphrina sadebeckii on Alnus glutinosa

Alnus glutinosa, Belgium, prov. Antwerp, Tongerlo, Engelse Kamp © Carina Van Steenwinkel

Taphrina sadebeckii on Alnus glutinosa

detail; the mealy appearance of the galls indicates that the fungus is sporulating

Taphrina sadebeckii: ascus

ascus, filled with spores (congo red staining)

gall

the galled spots rarely exceed 1 cm. Never witches’ brooms.

host plants

Betulaceae, monophagous

Alnus ?cordata, glutinosa, glutinosa x incana, incana subsp. rugosa.

notes

the gall can be mistaken for the one caused by Acalitus brevitarsus.

references

Bacigálová, Lopandic, Rodrigues ao (2003a), Bacigálová, Mułenko& Wołczańska (2005a), Bataille (1936a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Dietrich (2016b), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a).

mod 14.vii.2019