MycoBank number:MB 805450;Index Fungorum number:IF 805450;Facesoffungi number: FoF 08803; three morphologically defined species (Aptroot and Lücking 2016); molecular data available for two species (Lücking et al. 2016).

=BuscalioniaSambo nom. cons. prop., Ann. Bot., Roma 22: 27 (1940).

Type species:Buscalionia rubraSambo, Ann. Bot., Roma 22: 27 (1940) [=Marcelaria purpurina(Nyl.) Aptroot, Nelsen & Parnmen].

Lichenizedon bark in terrestrial, chiefly lowland tropical wet forest habitats.Thallusdistinctly corticate, yellow-brown to olive-green.Photobiont Trentepohlia.Ascomatasolitary to often crowded or loosely aggregate, prominent to sessile, brown-black but covered by thick thallus and a thick layer of yellow-orange to red pigment crystals, hemispherical to wart-shaped, coriaceous, ostiolate, ostiole apical.Excipulumprosoplectenchymatous, dark brown to carbonized.Hamatheciumcomprising 0.5–0.7 µm wide para-physoids, hyaline, straight, branched and anastomosing, embedded in a gelatinous matrix.Asci2–8-spored, bitunicate, fissitunicate, oblong-clavate, short pedicellate, with a non-amyloid ocular chamber.Ascosporesirregularly arranged to biseriate, fusiform-ellipsoid, hyaline, richly muriform, with somewhat thickened distosepta and rounded lumina, smooth-walled, not or slightly constricted at the septa, often with a gelatinous sheath.Pycnidiaunknown.

Chemistry: lichexanthone sometimes produced on thallus surface; yellow to orange or red anthraquinones present on the ascomata.

Type species:Marcelaria purpurina(Nyl.) Aptroot, Nelsen & Parnmen, Glalia 5(2): 9 (2013) [=BuscalioniarubraSambo, Ann. Bot., Roma 22: 27 (1940)].

Notes: For key and discussion see Aptroot and Lücking (2016). The older nameBuscalioniahas recently been discovered to be congeneric withMarcelariaand has been proposed for conservation (Aptroot and Nepi 2017), with the decision pending.

Species