The genus
Coniocarpon, as revitalized by Frisch and colleagues in 2014, comprises lichens with a smooth
thallus that is either immersed or slightly protruding, typically pale brown and often outlined by a dark line. Its is of the type. The
apothecia (fruiting bodies) of these lichens are irregularly rounded to weakly lobed, either or , and emerge singly or in clusters. The is brown, consisting of compressed, vertically aligned hyphae, which sometimes form short hairs on the outer margin and may have old bark cells attached. The of the apothecia is dark, ranging from flat to slightly convex, and may have a white surface, sometimes overlaid with an orange-red , with margins that are level with the disc and may also be prominently orange-red pruinose, containing crystals. The is brown, composed of branched tips of paraphysoidal hyphae that extend horizontally above the asci. The
hymenium is colourless and strongly , with a of densely branched and netted . The is also colourless. The
asci of
Coniocarpon are of the
Arthonia-type, to in shape, and typically contain eight spores. Its are colourless, with an enlarged apical cell, turning pale brown with granular ornamentation at maturity. Chemically, the exciple and epithecium react blue upon
staining with solutions of
iodine and
potassium iodide, while the hymenium and hypothecium react red with iodine and blue with
potassium iodide. The orange-red crystals dissolve in
potassium hydroxide solution to form a transient, purplish solution. ==Species==