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.
Melanographium phoenicis (MFLU18-1587, holotype). a–c Colonies on natural substratum. d–e Conidiophores with conidiogenous cells bearing condia, note (e) conidiophores in loose flared fascicles. f Conidiophores in loosely fascicles. g–i Attached conidia at the proliferation of conidiophores that often at nodose. j Conidiogenous cells with conidiogenous scars. k–l Conidia. m Colony on PDA. n–p Conidia producing in culture. Scale bars: a–c = 100 μm, d–f = 50 μm, g–h, k–l = 10 μm, i–j = 20 μm, n–p = 5 μm.
Reference
Hyde, K.D. et al. (2020) Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 100:5–277
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