Boerlagiomyces Butzin, Willdenowia 8(1): 39 (1977).
Index Fungorum number: IF 607; Facesoffungi number: FoF 00176, 8 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic on decaying wood. Sexual morph: Ascomata superficial, seated on a subiculum, globose, scattered, with flexuous, hairy, black, velvety, septate setae, surrounded by black mycelium. Peridium composed of carbonaceous, multilayered 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, gently curved, obtuse at both ends, muriform, multiseptate, not constricted at septa, hyaline, smooth-walled. Asexual morph: Unknown (adapted from Boonmee et al. 2014).
Type species: Boerlagiomyces velutinus (Penz. & Sacc.) Butzin.
Notes: Boerlagiomyces is characterised by superficial, globose, scattered ascomata seated on a subiculum, cylindric-clavate asci and muriform, multiseptate ascospores. Barr (1980) suggested Boerlagiomyces is similar to Tubeufia sect. Thaxteriella based on the dark, fleshy ascocarps on a well-developed, dark subiculum and elongate, muriform ascospores. Rossman (1987) suggested the presence of longitudinal septa in cells of the ascospores as a useful character to differentiate Boerlagiomyces from Tubeufia sect. Thaxteriella. Crane et al. (1998) revised Boerlagiomyces and provided a key to six accepted species in Boerlagiomyces. Stanley and Hyde (1997) and Crane et al. (1998) considered Garethjonesia as a synonym of Boerlagiomyces but these two genera are morphologically different and also have a different habitat. In the phylogenetic analysis of Kodsueb et al. (2006) based on LSU sequence data, a putative strain of Boerlagiomyces websteri clustered with Rhytisma acerinum in Rhytismataceae and the authors suggested to exclude Boerlagiomyces from Tubeufiaceae. Boonmee et al. (2014) provided an updated description of Boerlagiomyces and treated Garethjonesia in Ascomycetes incertae sedis. Boerlagella Penz. & Sacc., is the earlier name of Boerlagiomyces used by Penzig and Saccardo (1897) but is now invalid since it was anteceded by Boerlagella Cogn. Members of Boerlagiomyces are differentiated based on the large, mostly hyaline, muriform ascospores. Boerlagiomyces websteri has muriform ascospores while other members of Tubeufiaceae have filiform to fusiform ascospores. Boerlagiomyces is morphologically and phylogenetically a distinct genus in Tubeufiaceae. Molecular markers available for Boerlagiomyces include ITS, LSU, SSU and TEF-1.
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