Growing on brown rot pine.
Cribraria martinii?
Spores: 6-6.5µm
Granules: 0.5 - 1µm
Stalk: 1.5mm
Sporotheca: aprox 400µm
Substrate: Decorticated Pinus
Longitudinal Ribs < 20
Unsure about the id
On Populus tremuloides.
White surface, dark brown inside.