Unknown From the New Forest

This seems to be a attractive bark fungus, collected from a young Oak with Micarea pycnidiophora and an isidiate Micarea prasina s. lat. species in old woodland in the New Forest. In macro it looks like a Cryptodiscus species, with erumpent apothecia that are swollen when wet but shrunken and ulcerate when dry, but the internal features do not match.

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Apothecia, damp above, dry below.

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Margin, intact and in squash

The paraphyses are long and unbranched, the spores are about seven septate and 30 – 35 x 8 – 10 µm, while the ascus tips in K/I give a Catillaria-type like structure

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Spores & Asci above in K/I below

Any ideas?

Neil