Melanographium phoenicis

Melanographium phoenicis

S.N. Zhang, K.D. Hyde & J.K. Liu Fungal Diversity 100: 235 (2020)

Classification: Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Xylariales-incertae sedis-Melanographium

Host species: Phoenix paludosa

Holotype: MFLU 18-1587

Known distribution: Trat Province, Thailand

IF Number: IF557001      Mycobank Number: 557001      FOF Number: FoF06504

Description

Saprobic on decaying rachides of palm. Sexual morph: Undetermined. Asexual morph: Colonies on the substratum superficial, effuse, tufted, black. Mycelium immersed, composed of branched, septate, smooth, pale brown hyphae. Conidiophores 125–170 μm long (x̅ = 147.7 μm, n = 20), 3.5–6.5 μm wide (x̅ = 5.5 μm, n=20), macronematous, 3–5 in loose flared fascicle or rarely single, unbranched, multiseptate, thick-walled, smooth, slightly geniculate near the apex, straight or flexuous, with percurrent proliferation that is often nodose, brown below, becoming pale brown above to subhyaline at the tip. Conidiogenous cells polyblastic, integrated, terminal and intercalary, cylindrical, cicatrized, intercalary conidiogenous loci often at the nodose proliferations, with conidiogenous scars. Conidia 11–18 μm long (x̅ = 14.4 μm, n= 30), 6–9 μm wide (x̅ = 7.9 μm, n= 50), holoblastic, solitary, aseptate, olivaceous to dark brown, reniform or obovoid, with a subhyaline longitudinal germ-slit on the convex side, guttulate, verruculose, smooth-walled. Conidial secession schizolytic.

Culture conditions: Colonies growing on MEA, velvety, with flat surface, firstly whitish, and becoming olive to grey-green or light grey-green.