Oxydothis palmicola

Oxydothis palmicola

Konta & K.D. Hyde (2016)

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Xylariales-Oxydothidaceae-Oxydothis

Host species: Elaeis guineensis (Konta et al 2016)

Holotype: MFLU 15-2339 (Konta et al 2016)

Known distribution: SongKhla, Thailand

IF Number: IF552540      Mycobank Number: 552540      FOF Number: FoF02705

Description

Saprobic on dead leaves of Eleais guineensis Jacq. (Arecaceae). Sexual morph: Ascomata 111–195 μm diam. (x̅ = 166 μm diam., n = 40, up to 220 μm), solitary or aggregated, mostly solitary when young, becoming grouped at maturity, immersed, appearing as non-blistering areas through the host tissue, axis oblique or perpendicular to the host surface, with a central, 59–79 μm high × 182–263 μm diam. (x̅ = 67 × 215 μm, n = 5) papilla curving upwards and piercing the host cuticle. Peridium 18–34 μm (x̅ = 25 μm, n = 10), thick-walled, outer cells merging with the host epidermal cells, comprising dark brown to black, cells of textura angularis. Asci 138–145 × 15–20 μm (x̅ = 141 × 18 μm, n = 10), 8-spored, unitunicate, cylindrical-clavate, pedicellate, with a J+, wedge- shaped, subapical ring. Ascospores 51–53 × 6–8 μm (x̅ = 52 × 7 μm, n = 20), 2−4-seriate, fusiform, tapering gradually from the center to the ends, centrally 1-septate, not constricted at the septum, with pointed ends, hyaline, one large guttule at the center when immature, with one large guttules when in each cell mature, sometimes smaller near the ends, smooth-walled. Asexual morph: Undetermined. Appressoria 18–36 μm high × 12–16 μm diam. (x̅ = 23 ×14 μm, n = 10) solitary, hyaline to light brown, irregular in shape, thick-walled.

Culture conditions: Ascospores germinating on MEA within 24 hours and germ tube developing appressoria. Colonies on MEA, grey to olivaceous, white at the center, dense, with fairly fluffy surface, hyphae, septate, branched, smooth-walled.