Thallus bullate-areolate, consisting of pale brown to grey, convex, basally constricted areoles, 0.2-1.5 mm broad, older areoles sometimes somewhat sunken and darker towards the center; medulla and upper algal-free layer I, or locally I+ pale violet. Photobiont chlorococcoid.
Apothecia black when dry and dark brown when wet, soon convex, up to 1.7 mm in diam; proper margin only apparent in young apothecia, in section cupular, unpigmented, except for a narrow, epihymenium-like brown rim. Hymenium 75110 µm tall, upper 1520 µm with brown pigment; paraphyses ± 2.0 µm wide, branched and anastomosing, apically up to 35 µm; epihymenium olive-brown. Asci clavate-cylindrical, 5570 × 1217 µm, Porpidia-type; ascospores simple, hyaline, ellipsoid, with a thin halo, (10)1215 (18) × (5) 66.5 (8) µm. Hypothecium hyaline.
Conidiomata: not detected.
Chemistry: no substances by TLC.
Etymology: Named after Brian Coppins, in admiration of his outstanding contributions to the knowledge of crustose lichens.
Distribution and Ecology: Known only from siliceous rocks in maritime Antarctica.
Remarks: Closely related to Poeltiaria subcontinua (Nyl.) Hertel & Fryday and largely consistent with the anatomical characters of its ascocarps. Differing in thallus structure and perhaps in its Maritime Antarctic distribution, for it is still unknown from those subantarctic regions (South Georgia, Prince Edward Islands, Īles Kerguelen), where P. subcontinua is known to occur.
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