Asexual morph: Undetermined. Sexual morph: Ascomata non-stromatic dark brown to black, usually aggregated in circular groups, occasionally in rows or solitary, growing between periderm and wood, often associated with old stromata of other ascomycetes. When in circular groups, venter lying horizontally, necks are decumbent to perpendicular, converging, piercing the periderm in a group. Venter globose to subglobose, easily detached from the substratum, with cylindrical neck. Venter and neck are sparsely covered with dark olive to red-brown pubescence that disappears with age, mostly necks and bottom part of venter remain covered with hairs. Ascomatal wall leathery to fragile, 2-layered. Ostiolum periphysate. Paraphyses abundant, persistent, longer than the asci. Asci arising from croziers on elongating ascogenous hyphae, floating freely in the centrum at maturity; unitunicate, clavate, tapering toward the slender stipe; basal part of the stipe conspicuously swollen, often remaining attached to the ascogenous hyphae after the mature ascus is liberated. Ascospores ellipsoid, oblong, subcylindrical, straight, sometimes curved, allantoid, U- to horseshoe-shaped or ¾ circular, hyaline, 1- to several-septate. Réblová et al. (2015).
Type species: Barbatosphaeria barbirostris (Dufour) Réblová, Mycologia 99(5): 727 (2008)
Notes: Barbatosphaeria is a non-stromatic perithecial ascomycete introduced for a single species Barbatosphaeria barbirostris and placed in the Sordariomycetes genera incertae sedis based on nuc28S rDNA sequences (Réblová 2007). Réblová et al. (2015) revisited Barbatosphaeria and introduced seven species for this genus. Luo et al. (2019) introduce one new species and this is the only known Barbatosphaeria species collected from freshwater habitats.
Barbatosphaeria lignicola Luo et al.
Réblová M, Fournier J, Štěpánek V (2015a) Molecular systematics of Barbatosphaeria (Sordariomycetes): multigene phylogeny and secondary ITS structure. Persoonia 35:21–38
Réblová M (2007) Barbatosphaeria gen. et comb. nov., a new genus for Calosphaeria barbirostris. Mycologia 99:723–732