Vialaea Sacc., Bull. Soc. mycol. Fr. 12: 66 (1896)

MycoBank number: MB 5736; Index Fungorum number: IF 5736; Facesoffungi number: FoF 00011; 4 morphological species (Species Fungorum 2020), 3 species with sequence data.

Type speciesVialaea insculpta (Fr.) Sacc.

NotesVialaea comprises Vialaea bambusae, V. insculpta, V. minutella and V. mangiferae (Shoemaker et al. 2013, Senanayake et al. 2014, Index Fungorum 2020). Vialaea insculpta was reported from twigs and leaf veins of Ilex aquifolium grown commercially as ornamental plants. This species is reported only from in Europe and North America (Atkinson & Trelawny 1962, Shaw 1973). In this entry we illustrate Vialaea insculpta.

Figure 258 Vialaea insculpta (Material examined – GERMANY, Nordrhein-Westfalen, Deutschland, Westfalen, Bottrop, an der zerzogstrasse, on twigs of Ilex aquifolium, 2 August 1922, H. Rupprecht, S-F121733). a Packet of the herbarium. b Herbarium specimens. c Ascostromata on host. d Vertical section of ascoma. e Peridium. f Periphyses in ostiolar canal. g-k Asci. l Apical ring bluing in Melzer’s reagent. m-r Ascospores. Scale bars: c = 500 µm, d, f = 100 µm, e = 20 µm, g-k = 50 µm, l = 10 µm, m-r = 20 µm.

Figure 259 – Asexual morph of Vialaea mangiferae (Material examined – THAILAND, Chaing Rai Province, Muang District, near Bandu, Baan Khuakhae, at 31M. 17, (19° 59’ 52.05” N; 99° 49’ 25.15” E), on twigs of Mangifera indica, 15 Nov. 2012, leg. K. D. Hyde, CHUNI001; MFLU13– 0342, HKAS 81790, holotype). a Culture from above. b, c Conidiomata forming on Water Agar. d, e Conidia forming on phialides attached to conidiophores. f Conidia. Scale bars: b = 1 mm, c = 500 µm, e, f =10 µm.