Ramonia Stizenb.
Thallus crustose, epiphloeodal or in part hypophloeodal, homoiomerous, ecorticate, not gelatinous when wet, corticolous or muscicolous. Photobiont green Trentepohlia. Apothecia at first immersed, becoming emergent, adnate, globose or depressed-globose, thalline margin thin or thick, wrinkled, not much raised, lacerate, disappearing or closed over disc, or forming a narrow punctiform opening dehiscing from disc and becoming orbicular-dilated, margins of aperture fringed or crenulate or fissured, in radiating, recurved layers. Disc gyalectiform, ± immersed, concave, naked. Excipulum thin, paler or red- brownish, of felted, leptodermatous hyphae. Hymenium colourless, subhymenium thin. Paraphyses numerous, conglutinate, straight, simple, colourless, apices gradually thickened, septate (septa visible in I solution). Asci cylindrical-clavate to cylindrical, (1-)8-spored to many (20-40-80) spored. Ascospores ellipsoid or ovoid or fusiform-elongate, simple or transversely 1-10-septate, colourless, halonate. Pycnidia not seen.
Ramonia is a genus of c. 15 species included in the family Thelotremaceae. Northern Hemisphere species are well studied [Vězda Folia geobot. phytotax. 1: 154-175 (1966); Folia geobot. phytotax. 2: 311-317 (1967); Folia geobot. phytotax. 8: 417-424 (1973)] but taxa from the Southern Hemisphere are still very poorly known. At least six species occur in New Zealand from Northland to Stewart and Auckland Is, and are corticolous or muscicolous, characteristic of deeply shaded, humid habitats.
