Found by chance while using a leaf to wrap a fungus sample! It opened its slit. Shady woods. On old Hedera hibernica. The biggest unit measured almost 1mm long.
Based on the size of the spores which are smaller than H. chrysospermus. On a grayish Bolete sp. Shady woods.
On a Bolete sp. ID is based on the size of the spores which are smaller than H. chrysospermus. Shady woods. The parasite appeared quite quickly. Two days ago there was nothing on that spot. Hedera helix makes it dark and keeps the moisture longer.