Megaloblastenia Sipman
As for Megalospora but with the following differences: Thallus without isidia or soredia. Hymenium 110-180 µm tall, without oil droplets and staining I+ blue. Ascospores 1-septate with thick septa and apical walls.
Key
Megaloblastenia is an austral genus of two species included in the family Megalosporaceae [Sipman Biblthca lich. 18: 87-93 (1983)]. Both are known from New Zealand, with one species being endemic.