Boerlagiomyces Butzin., Willdenowia 8(1): 39 (1977).

Boerlagella Penz. & Sacc., Malpighia 11(9-10): 404 (1897)

Saprobic on decaying wood.Sexual state:Ascomata superficial, seated on a subiculum, globose, scattered, with flexuous, hairy, black, velvety, septate setae, surrounded by black mycelium. Peridiumcomposed of carbonaceous, multi-layered walls. Hamathecium composed of filiform, hyaline pseudoparaphyses.Asci 8-spored, bitunicate, cylindric-clavate, narrowing towards base, short-pedicellate or apedicellate, apically rounded. Ascospores 2–3-seriate, cylindric-fusoid, gentlycurved,obtuse at both ends, muriform, multiseptate, notconstrictedat septa,hyaline, smooth-walled(adapted from Penzig and Saccardo 1904).Asexual state: Unknown.

Notes: The genus Boerlagiomyces was introduced by Butzin (1977) with B. velutinus (Penz. & Sacc.) Butzin as the type species. The genus is distinctive inproducing superficial, whitish to pale brown, soft ascomata with large hyaline, muriform ascospores that often develop on submerged wood in freshwater. Crane et al. (1998) monographed and accepted six species in Boerlagiomyces in Tubeufiaceae. This genus presently comprises nine species according to Index Fungorum (2014). A putative strain of Boerlagiomyces websteri Shearer & J.L. Cranewas placed with Rhytisma acerinum(Pers.) Fr. in Rhytismataceae by Kodsueb et al. (2006); this seems unlikely.Garethjonesia has been considered a synonym of Boerlagiomyces (Stanley and Hyde 1997; Crane et al. 1998), however they are morphologically distinct. The habitats (aquatic versus terrestrial) also differ. We treat Garethjonesiahere as a good genus in Ascomycetes incertae sedis.

Type speciesBoerlagiomyces velutinus (Penz. & Sacc.) Butzin, Willdenowia 8(1): 39 (1977).