Dictydium cancellatum Chinese Lantern
Not much detail but sort of arty!
Sporangia are 1- 4 mm tall with globose to flattened, red-brown to purple-brown heads. The outer wall has thick ribs which persist to form a cage-like head at maturity. The Chinese Lantern slime mould fruits on well-rotted wood. It is quite common but difficult to spot because it blends with the woody background. Also click hereand here an here.