Petrakia echinata (Peglion) Sydow, 1913

on Acer

Acer pseudoplatanus Belgium, prov. Limbourg, Kerkhoven, den Tip, 10.x.2025 © Carina Van Steenwinkel

detail

epiphyllous sporodochia

sporodochium

conidium

conidia

parasite

Leaf spots with epiphyllous caespituli. Conidia brown, smooth, elliptic, several septa in two directions, 10-24 x 12-20 µm, with 5-20 µm long blunt thorns extending to all sides.
The teleomorph develops perithecia on the upper surface of fallen leaves; mature ascospores pale brown, 4-7 x 17-22 µm, 1(3)-septate (Butin ao)

host plants

Sapindaceae, monophagous

Acer pseudoplatanus.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Brandenburger (1985a: 360), Butin, Holdenrieder & Sieber (2013a), Gross, Beenken, Dubach, ao (2017a).