Endocalyx metroxyli

Endocalyx metroxyli

Konta & K.D. Hyde (2021)

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Xylariales-Cainiaceae-Haploanthostomella

Host species: Metroxylon sagu (Konta et al. 2021)

Holotype: MFLU 15-1454 (Konta et al. 2021)

Known distribution: Krabi, Thailand

IF Number: IF558116     Mycobank Number: 558116     FOF Number: FoF09176

Description

Saprobic on dead petiole of Metroxylon sagu. Colonies on host plant, pustules. Sexual morph: Undetermined. Asexual morph: Conidiomata 340–660 μm wide, in vertical section 495–820 × 325–485 µm, acervulus, solitary, semi-immersed to immersed in the host epidermis, beneath a clypeus, visible as slightly raised and blackened, black, carbonaceous, fragile, with an ostiolar canal. Ostiolar opening surrounded by a yellow margin. Peridial wall 34–80 μm wide, thick, comprising dark brown cells of textura angularis. Conidiomata not observed with a basal cylinder covering a central column or a slender central column in our collection. Conidiophores reduced to conidiogenous cell, hyaline to pale-brown, unbranched, smooth. Conidia 13–16 × 7–10 µm (x̄ = 13 × 10 µm, n = 30), unicellular, ellipsoid-globose, brown to dark brown, with short pegs bearing conidia, with germ slit, smooth-walled.

Culture conditions: Colonies on MEA, at first white, raised, effuse, velvety to hairy, circular, smooth at the margin, white from above, pale-brown from below.