Camarosporidiellaceae Wanas., Wijayaw., Crous & K.D. Hyde, fam. nov. MycoBank MB 821939

Etymology: Referring to the name of the type genus.

Saprobic or endophytic or pathogenic on leaves and wood. Asexual morph: Coelomycetous. Conidiomata pycnidial, immersed to sub-peridermal, globose, dark brown to black, unilocular. Conidiomata wall thick-walled, dark brown, composed of cells of textura angularis, inner layer with hyaline cells. Ostiole single, circular, central, papillate. Conidiogenous cells enteroblastic, annellidic, integrated to discrete, doliiform, lageniform or cylindrical, smooth, hyaline, formed from the inner cells of the pycnidial wall. Conidia medium brown to dark brown, phragmosporous to muriform, variable in shape, mostly ellipsoidal, curved to straight, truncate at the base, obtuse at the apex, continuous or constricted at the septa. Sexual morph: Ascomata gregarious to solitary, immersed to erumpent, globose to subglobose, black, unilocular, ostiolate. Ostiole black, papillate. Peridium with several cell layers of textura angularis, with outer layer brown to reddish-brown, inner layer hyaline to sub hyaline. Asci stipitate, cylindrical, bitunicate, (2–)4–8-spored. Ascospores uniseriate, ellipsoidal, medium brown, mostly with obtuse ends, muriform, 3–8 transverse septa, with 1–2 longitudinal septa, constricted at septa.

Type genus: Camarosporidiella Wanas., Wijayaw. & K.D. Hyde.

Notes: Camarosporidiellaceae forms a highly-supported monophyletic lineage (97 %/97 %/1.00; Fig 1, clade A) but lacks internal support. Morphological features are not informative for generic distinction within Clade A. The taxa studied here are treated according to the phylogenetic clades (Subclades A1–A12, Fig. 1).