Apothecia: poriform
Ascospores: 75-125 x 35-90 Ám; 2-4/ascus
Chemistry: alectoronic acid

Eighteen collections from upland/mountain rocks on Campbell Island.

Notes: Possibly con-specific with northern hemisphere species O. xanthostoma, which has smaller ascospores, 55-75(-85) × 30-40 μm. Also similar to the arctic species O. rhodoleuca and O. subplicans, but both of these have much smaller ascospores (< 50 x 30 Ám) that are 8/ascus.

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Thallus and apothecia