Thallus as discrete, round, flat, subsquamulose lobes, up to 0.5 mm across, pale greenish
to green-brown. In vertical section there is a 15−20 μm high colorless cortex with isodiametric thin-walled cells, 5−6 μm diam., a 60−65 μm high medulla, densely packed with green algae, a hypothallus-like tissue, 130−150 μm high, with parties of melanized cells; lower cortex indistinct or absent. Perithecia rare, on margin of areolae, black, half emergent, up to 0.2 mm diam. Involucrellum present, spreading laterally and partly below the centre. Exciple dark brown. Central cavity 110−120 μm diam. Ascospores 10−12 × 5−7 μm.
Ecology. On calcareous rock, no other species present.
Distribution. Only known from Hornsund and Hinlopenstretet.
Notes. Characterised by its dispersed, rounded, flat areolae with perithecia at margin, and small ascospores. It may be confused with V. macrostoma which also may have dispersed areolae, but the latter species has much larger ascospores. World distribution: endemic to Svalbard.