Pleurotremataceae Walt. Watson, New Phytol. 28: 113 (1929).

MycoBank number: MB 81192; Index Fungorum: IF 81192; Facesoffungi number: FoF 01911, 47 species.

= Dyfrolomycetaceae K.D. Hyde, K.L. Pang, Alias, Suetrong & E.B.G. Jones, in Pang et al., Cryptog. Mycol. 34(3): 227 (2013).

Saprobic on wood in terrestrial and aquatic habitats. Sexual morph: Ascomata perithecial, gregarious or solitary, immersed or erumpent throughout the host, dark-brown to black, ovoid to subglobose, carbonaceous to membranaceous, clypeate, ostiolate, papillate. Peridium comprising of dark pigmented cells of textura angularis or epidermoidea. Hamathecium comprising numerous, filamentous, hyaline, septate, branched or unbranched, narrow cellular pseudoparaphyses. Asci 8-spored, bitunicate, clavate to cylindrical, short pedicellate, apical ring present, J-. Ascospores uniseriate, ellipsoidal to cylindrical or fusiform, hyaline, septate, smooth-walled, mostly with guttules. Asexual morph: Undetermined.

Type: Pleurotrema Müll.

Notes: Pleurotremataceae is typified by Pleurotrema with Pleurotrema polysemum as the type species. Subsequently, the nomenclature and placement of this family has been the subject of discussion until Maharachchikumbura et al. (2015) placed it under Chaetosphaeriales, Sordariomycetes. Maharachchikumbura et al. (2016) examined the isotype of P. polysemum and found that Dyfrolomycetaceae (Dyfrolomycetales) is a synonym of Pleurotremataceae, thus removed Pleurotremataceae from Sordariomycetes to be a single family of Dyfrolomycetales. This family comprises three genera, and most members are characterized by perithecial, ostiolate, glabrous, ovoid to subglobose ascomata, clavate to cylindrical, unitunicate, short pedicellate asci with a J- apical ring, and hyaline, ellipsoidal to cylindrical, septate, guttulate ascospores that are uni-seriately arranged in the asci.