New Species - smut fungus Melanustilospora ari

Like the Barren Strawberry Rust recently recorded this is a fungus I would never have spotted if its existence hadn't been brought to my attention. At a glance it looks very similar to the black spots which occur on quite a few Cuckoo Pint leaves. Why some leaves are pure green and other plants have black spots on their leaves I have no idea but sometimes black spots are not colouration but are a smut fungus infection. The difference is mainly that the the spots are three dimensional and the underside of the leaves show a swelling for each spot.