Fungalpedia – Note 2009, Vialaeaceae
Vialaeaceae P.F. Cannon
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Xylariales, Xylariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Parasitic or saprobic on dead plant matter. Sexual morph: Pseudostroma appears as ellipsoidal, black dots slightly raised from substrate, thick around the upper part of the ascomata. Ascomata perithecial, solitary or aggregates, immersed, globose, subglobose to ellipsoidal, coriaceous, black to brown, papillate, ostiolate with periphyses. Papilla long, sometimes distal end curving towards the substrate, periphysate. Peridium thick, composed of outer, dark-brown, thickwalled cells of textura angularis and inner, hyaline, thick-walled cells of textura angularis. Paraphyses filiform, rarely branched, septate, hyaline, sometimes apex slightly swollen. Asci 8- spored, unitunicate, cylindrical, sometimes tapering towards the apex or base, short-stalked or sessile, thin-walled except apex, apex obtuse or truncate, apical ring subconical or subapical, J+. Ascospores biseriate, triseriate to fasciculate, sometimes weakly helically coiled, hyaline, strongly isthmoid, ends fusiform to rhombic, apical portion sometimes slightly larger than the basal part, 1– 3-septate, smooth-walled. Asexual morph: Ceolomycetous. Conidiomata pycnidia, superficial, solitary, scattered, globose, with slimy, shining spore mass and basal mycelium forming thick, black strands. Conidiophores erect, branched, septate, hyaline. Conidiogenous cells phialidic, discrete or in small whorls, lageniform to cylindrical, hyaline. Conidia oblong to ellipsoidal, 1- celled, hyaline smooth, with truncate abscission scar (adapted from Senanayake et al. 2014).
Notes: The phylogenetic placement of Vialaeaceae was confirmed in Xylariales (Shoemaker et al. 2013, Senanayake et al. 2014, Maharachchikumbura et al. 2015b). However, this family was accommodated in Amphisphaeriales based on phylogeny (Hyde et al. 2017a) and this is confirmed in this study.
Type genus: Vialaea Sacc.
References
Shoemaker RA, Hambleton S, Liu M. 2013 – Vialaea insculpta revisited. North American Fungi 8, 1–13.
Entry by
Kevin David Hyde, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, P.R. China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai 50150, Thailand, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, P.R. China, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, World Agroforestry Centre, East and Central Asia, Kunming 650201, Yunnan, P.R. China
Published online 28 February 2020