Striatiguttula phoenicis
Striatiguttula phoenicis
S.N. Zhang, K.D. Hyde & J.K. Liu MycoKeys 49: 115 (2019)
Classification: Ascomycota-Pezizomycotina-Dothideomycetes-Pleosporomycetidae-Pleosporales-Striatiguttulaceae-Striatiguttula
Host species: Phoenix paludosa
Holotype: MFLU 18-1579
Known distribution: Ranong Province, Thailand
IF Number: IF828275 Mycobank Number: 828275 FOF Number: FoF05035
Description
Saprobic on mangrove date palm Phoenix paludosa. Sexual morph: Ascomata in vertical section 195–580 µm high, 135–390 µm diameter, (x̅ = 396.0 × 230.3 µm, n = 15), black, scattered, rarely gregarious, immersed, and erumpent through host epidermis by a papilla or a short neck, ampulliform, subglobose, uni-loculate, coriaceous to carbonaceous, ostiolate, periphysate, papillate, glabrous or somewhat interwoven pale brown hyphae or setae, lying around apex of the neck. Peridium 10–24 µm thin, composed of several pale brown to hyaline cells of textura angularis, compressed and pallid inwardly. Wall of the neck composed thick and elongated angular pale brown to brown cells with hyaline inner layers. Hamathecium of 1–2 µm wide, septate, branched, filamentous, anastomosing, trabeculate pseudoparaphyses, embedded in a gelatinous matrix. Asci 89–141 × 12–18 µm, (x̅ = 120.5 × 15.4 µm, n = 20), 8-spored, bitunicate, fissitunicate, cylindric-clavate, pedicellate, apically rounded, with an ocular chamber. Ascospores 20–29 × 6–10 µm, (x̅ = 24.5 × 7.8 µm, n = 40), hyaline to brown (all cells nearly concolorous), uniseriate to biseriate, fusiform to ellipsoidal, 1–3-septate, constricted at the central septum, the upper middle cell slightly swollen and larger, straight or slightly curved, striate, guttulate, surrounded by an irregular mucilaginous sheath. Asexual morph: Undetermined.
Culture conditions: Colonies on PDA attaining 14 mm diam within 21 days at 25 ºC under natural light, velvety, centrally raised, greenish grey or greyish olivaceous, reverse dull olivaceous or grey, with a margin of translucent, milky white to hyaline mycelium.