Coelodictyosporium Thambug. & K.D. Hyde, in Thambugala et al., Fungal Diversity 74: 218 (2015).
Index Fungorum number: IF 551286; Faceoffungi number: FoF 00802, 3 morphological species (Species Fungorum, 2022), 3 species with molecular data.
Saprobic on dead branches in terrestrial habitats. Sexual morph: Ascomata solitary or gregarious, immersed, black, globose to subglobose, ostiolate. Ostiole crest-like, central, broadly papillate, with a pore-like opening. Peridium wider at the apex and thinner at the base, composed of two layers, outer layer comprising dark brown to black, rather flattened cells of textura angularis and inner layer comprising 2–3 layers of brown to lightly pigmented cells of textura angularis. Hamathecium comprising 1.5–3μm wide, numerous, aseptate, unbranched, cellular pseudoparaphyses, anastomosing above the asci, embedded in a gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, cylindric-clavate, with a long pedicel, apically rounded, with an ocular chamber. Ascospores uni to bi-seriate, partially overlapping, yellowish to brown, ellipsoid to fusiform, muriform, 5–6 transversely septate, with 1–2 vertical septa, deeply constricted at the middle septum, upper part slightly wider, with terminal appendages and surrounded by a thick mucilaginous sheath. Asexual morph: Colonies growing on dead branches. Conidiomata pycnidial, on the upper surface of stems, solitary, scattered, superficial, globose to subglobose, black. Peridium thin at the apex, base a single layer, composed of brown to black thin-walled cells of textura angularis. Conidiogenous cells holoblastic, integrated, smooth, brown, producing a branched conidium at the apex, cup-shaped or doliiform. Conidia uniformly medium brown, complanate, dictyosporous, frequently comprising of 6–8 rows of cells, each row comprising 5–7 cells (Adapted from Thambugala et al., 2015).
Type species: Coelodictyosporium pseudodictyosporium (Qing Tian, Camporesi & K.D. Hyde) Thambug. & K.D. Hyde
Notes: Coelodictyosporium was introduced by Thambugala et al. (2015) with C. pseudodictyosporium as the type species. Coelodictyosporium resembles Dictyosporium in having brown applanate conidia. However, conidia formation of Dictyosporium occurs right on mycelia, whereas in Coelodictyosporium this occurs in pycnidia (Liu et al. 2015). Coelodictyosporium is morphologically and phylogenetically a distinct and well-defined genus in Lophiostomataceae. Molecular markers available for Coelodictyosporium are LSU, SSU, ITS and TEF-1.