Reddish Crust Fungus

A reddish crust fungus, probably Eichleriella deglubans, growing on a horse-chestnut tree (Aesculus hippocastanum).

The spores (prepared by the method given here) look like this at x600:

From the image width of 86um, the spores are about 16 x 6um which agrees well with the size range 12-18 x 6-7um for the European form given here at MycoBank.

First photo taken in the Wilderness, Whiteknights Park, Reading, UK, on 2012-12-18.