Lopadostoma (Nitschke) Traverso, Fl. ital. crypt., Pars 1: Fungi. Pyrenomycetae. Xylariaceae, Valsaceae, Ceratostomataceae (Florence) 1(2): 169 (1906)
Xylariomycetidae, Xylariales, Lopadostomataceae, Lopadostoma
Index Fungorum number: IF2925; 24 morphological species (Species Fungorum 2020), 11 species with sequence data.
Saprobic on dead wood. Sexual morph: Stromata immersed to erumpent, seldom superficial, gregarious, scattered, densely compact, with abrupt margins, appearing as darkened areas, dark brown to dull black, coalescing in black linear rows, waxy, roughened, flattened at the top, with inconspicuous ascomatal mounds, embedded in carbonized encasement. Ectostromatic disc conspicuous, raised or flattened, grey, dark brown or black, tubercular or smooth. Ascomata subglobose or flask-shaped, multi-peritheciate, single to multi-layered, clustered into valsoid groups, sometimes with long ostiolar necks. Ostioles umbilicate or at the same level as stromal surface, black, cylindrical. Peridium amorphous, outwardly comprised of dark brown cells, inwardly hyaline, flattened cells. Paraphyses numerous, long, rarely branched, apically free. Asci 8-spored, unitunicate, cylindrical, pedicellate, apex rounded, with J+, discoid to wedged-shaped, apical ring, J+. Ascospores uniseriate, initially hyaline, turning brown to nearly black, unicellular, oblong or narrowly ellipsoidal, smooth-walled, without any patterns, germ slit full length, straight, guttulate at immaturity with a hyaline epispore. Asexual morph: Hyphomyceteous, libertella-like or sometimes nodulisporium or geniculosporium-like synanamorph (adapted from Senanayake et al. 2015, Daranagama et al. 2018).
Type species: Lopadostoma turgidum (Pers.) Traverso, Fl. ital. crypt., Pars 1: Fungi. Pyrenomycetae. Xylariaceae, Valsaceae, Ceratostomataceae (Florence) 1(2): 170 (1906)
Notes: Lopadostoma comprises saprobic species which produce pseudostromatic sexual morphs and libertella-like asexual morphs (Jaklitsch et al. 2014). So far, species delimitation of Lopadostoma is based only on LSU and ITS sequence data with low resolution, while protein coding regions, especially rpb2, are essential for further species delimitation (Daranagama et al. 2016, Jaklitsch et al. 2014).
Species illustrated in this entry:
Lopadostoma gastrinum (Fr.) Traverso
Lopadostoma turgidum (Pers.) Traverso