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 (Fig. 2). 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 below according to the phylogenetic clades (Subclades A1–A12, Fig. 1) as follows:

Camarosporidiella Wanas., Wijayaw. & K.D. Hyde, gen. nov. MycoBank MB 821940; Facesoffungi number: FoF 03529.

Etymology: Resembling the genus Camarosporium.

Saprobic or endophytic or pathogenic on leaves and wood in terrestrial habitats. Asexual morph: 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, centrally papillate. Macroconidiogenous cells enteroblastic, annellidic, integrated, indeterminate, doliiform, lageniform or cylindrical, smooth-walled, hyaline, formed from the inner cells of the pycnidial wall. Macroconidia medium brown to dark brown, phragmosporous to muriform, variable in shape, mostly ellipsoidal, curved to straight, truncate at base, obtuse at apex, continuous or constricted at the septa. Microconidiogenous cells present or absent in cultures, when present; intermingled with macroconidiogenous cells, hyaline, integrated, enteroblastic, percurrent annellidic, ampulliform to subcylindrical. Microconidia present or absent, when present; hyaline, round to oblong or ellipsoidal, with small guttules. Sexual morph: Cucurbitaria-like. Ascomata black, superficial to semi-immersed, gregarious, confluent, sometimes scattered beneath the host periderm or on decorticated wood, fully or partly erumpent, globose, black, ostiolate. Ostiole central, short. Peridium composed of blackish to dark brown cells of textura angularis, cells towards the inside lighter, composed of thin-walled cells of textura angularis. Hamathecium comprising numerous, branched septate, pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindrical, short-pedicellate. Ascospores overlapping uniseriate, muriform, mostly ellipsoidal, 3−8-transversely septate, with 2−4 vertical septa, constricted at middle septum, initially hyaline, becoming brown at maturity, slightly paler, conical and narrow at the ends, not surrounded by a mucilaginous sheath.

Type species: Camarosporidiella caraganicola (Phukhamsakda et al.) Phukhamsakda, Wanas. & K.D. Hyde.