Pestalotiopsis diploclisiae

Pestalotiopsis diploclisiae

Maharachch., K.D. Hyde & Crous (2014)

Classification:Ascomycota-Pezizomycotina-Sordariomycetes-Xylariomycetidae-Amphisphaeriales-Pestalotiopsidaceae-Pestalotiopsis

Host species: Areca triandra (Xiong et al. 2022)

Paratype: ZHKU 22–0009 (Xiong et al. 2022)

Known distribution: Guangdong, China

IF Number: IF809737       Mycobank Number: 809737       FOF Number: N/A

Description

Conidiomata stromatic, acervulus, erumpent, immersed under a host epidermal clypeus, raising host surface and producing a dark brown area of dehiscence, scattered. Conidiophores sparsely septate, unbranched or branched at the base, irregular, hyaline, up to 15 µm long. Conidiogenous cells 5 × 2 µm, discrete, smooth-walled, hyaline, sparsely verruculose, lageniform or sub-cylindrical. Conidia 16–25 × 5–6 µm (x̅ ± SD = 23 ± 2.6 × 6 ± 0.5 µm, n = 40), fusiform to ellipsoidal, 4-septate, straight to slightly curved; basal cell 3.5–6 µm long, conic with a truncate base, hyaline, minutely verruculose, thin- and smooth-walled; three median cells 10–15 µm long, x̅ ± SD = 14 ± 1.4 µm, doliiform, smooth, concolourous, olivaceous, septa darker than the rest of the cell (second cell from the base 4–5.5 µm; third cell 3.5–5 µm; fourth cell 3.5–6 µm); apical cell 3–6 µm long, hyaline, conical to subcylindrical, smooth-walled; apical appendages 8–20 µm long, x̅ ± SD = 14.5 ± 3.5 µm, 1–3 (most 2), tubular, arising from the apical crest, unbranched, filiform; basal appendage 4–8.5 µm long, single, tubular, unbranched, centric.

Culture conditions: Colonies on PDA attaining 35–45 mm diam after 7 d at 25 °C, with smooth edge, whitish, with sparse aerial mycelium on the surface with black, gregarious conidiomata; reverse similar in colour.