Hi
This the first year with a microscope to look at this white ascocarp that I see each year in one location. It starts as a cup and gets to 4-5cm and flattens out, it is always on small pieces of wood amongst litter in a wet, Cool Temperate Eucalyptus forest, solitary and bunching.
Asci: 310-360um, -ve MLZ, rounded base =-ve crozier, apical operculum
Spores: 24.3-29.5 x 10.0-11.4um, 2-3LB's 3.5-6.7um, most have blunted ends with indent, some with envelope.
Paraphyses: 1.5-3um, filiform, small droplets towards apex, septate and LBs
From the ID key it looks close to S.jurana to me but this seems unlikely with no history of it in this country. 
I hope someone can help.

Many thanks

Peter