Dactylidina dactylidis
Dactylidina dactylidis (Wanas., Camporesi, E.B.G. Jones & K.D. Hyde) Wanas. & K.D. Hyde, in Wanasinghe et al., Fungal Diversity: 10.1007/s13225-018-0395-7, [109] (2018)
=Allophaeosphaeria dactylidis Wanas., Camporesi, E.B.G. Jones & K.D. Hyde
Index Fungorum number: IF 554174; Facesofungi number: FoF 04016
Etymology: The specific epithet reflects the host genus Dactylis.
Holotype: MFLU 15-1358.
Saprobic on Dactylis glomerata. Sexual morph: Ascomata 120–160 μm high, 130–180 μm diam. (x̄ = 141.9 × 154 μm, n = 5), immersed to erumpent, solitary, scattered, globose or subglobose, dark brown to black, coriaceous, ostiolate. Ostiole up to 40–60 μm long and 20–30 μm wide, papillate, eccentric, blackish-brown, smooth, comprising brown cells. Peridium 5–10 μm wide at the base, 15–25 μm wide at the sides, comprising brown to dark brown cells of textura angularis. Hamathecium comprising numerous, 2–3 μm wide, filamentous, branched, septate, pseudoparaphyses. Asci 80–90 × 13–16 μm (x̄ = 84.4 × 14.5 μm, n = 30), 8-spored, bitunicate, fissitunicate, cylindric-clavate to clavate, short pedicellate, thick-walled at the apex, with minute ocular chamber. Ascospores 20–23 × 7–8 μm (x̄ = 21.8 × 7.5 μm, n = 50), overlapping 1–2- seriate, ellipsoidal to subfusiform, muriform, upper part wider than the lower part, 5–6 transversely septate, with 1 vertical septum, mostly vertical septa present in between both middle transverse septa besides central septum, vertical septa absent at the end cells, slightly constricted at the central septum, initially hyaline, becoming yellowishbrown at maturity, ends remaining lighter and cone-shaped, with rounded ends, surrounded by a thick mucilaginous sheath. Asexual morph: Undetermined.
Material examined: ITALY, Province of Forli-Cesena [FC], near Passo dei Mandrioli, on dead aerial stems of Dactylis glomerata L. (Poaceae), 23 June 2014, Erio Camporesi IT 1950 (MFLU 15-1358); ex-type living culture, MFLUCC 14-0966.
GenBank Numbers: ITS: MG828886, LSU: MG829002, SSU: MG829113, TEF: MG829199, RPB2: MG829253.
Notes: Liu et al. (2015) introduced Allophaeosphaeria dactylidis as the second species of Allophaeosphaeria which has ascospores similar to those characterized in Phaeosphaeria vagans, P. phragmiticola and P. phragmitis (Shoemaker and Babcock 1989). In this study, we collected another strain for Allophaeosphaeria dactylidis which was collected from Italy on Dactylis and synonymize it as Dactylidina dactylidis.
Figure x. Dactylidina dactylidis (MFLU 16-0872). a, b Ascomata on host substrate. c Section of ascoma. d Close up of ostiole. e Peridium. f Pseudoparaphyses. g–j Asci. k–o Ascospores. Scale bars: a = 1 mm, b = 200 μm, c = 100 μm, d, g–j = 20 μm, e = 5 μm, e, f, k–o = 10 μm.
References:
Liu JK, Hyde KD, Jones EBG, Ariyawansa HA et al. 2015 – Fungal diversity notes 1–110: taxonomic and phylogenetic contributions to fungal species. Fungal Diversity 72, 1–197.
Shoemaker RA, Babcock CE 1989 – Phaeosphaeria. Canadian Journal of Botany 67, 1500–1599.
Wanasinghe DN, Phukhamsakda C, Hyde KD, Jeewon R et al. 2018 – Fungal diversity notes 709–839: taxonomic and phylogenetic contributions to fungal taxa with an emphasis on fungi on Rosaceae. Fungal diversity 89, 1–236.