It seems too dull coloured for Bisporella. I also wonder if what you're holding is not a eucalypt leaf but an Acacia melanoxylon phyllode. If so, the size and colour of your fungus mean you might have Hymenotorrendiella eucalypti, though I can't see enough detail to be sure. See Hymenotorrendiella eucalypti for why that species has mistakenly been named 'eucalypti'.
It could quite possibly be Hymenotorrendiella eucalypti. I do not recall any Acacia melanoxylon in the area that it was found. The fruits did not have any hairs around the cup, but whats not to say that they weren't mature yet.
Ah well, it might remain a puzzle. Various small ascomycetes are found on leaf litter. Often it would need microscope work to be sure of even genus. Your leaf is the sort of thing that would make an ideal herbarium specimen. Lots of fruitbodies and seemingly at several stages of development.