Dematiopleospora fusiformis S.K. Huang & K.D. Hyde, 2017

Huang, Shike, Jeewon, Rajesh, Wanasinghe, Dhanushka N., Bulgakov, Timur S. & Kang, Jichuan, 2017, Phylogenetic taxonomy of Dematiopleospora fusiformis sp. nov. (Phaeosphaeriaceae) from Russia, Phytotaxa 316 (3), pp. 239-249 : 243

Dematiopleospora fusiformis S.K. Huang & K.D. Hyde , sp. nov. ( Fig. 2 )

Index Fungorum number: IF552576; Facesoffungi number: FoF 02724.

Etymology –The name fusiformis refers to the fusiform ascospores.

Saprobic on dead stems. Sexual morph Ascomata 190–210 × 350–400 μm (x = 200 × 385 μm, n = 5), solitary to scattered, immersed, eventually erumpent, unilocular, globose to subglobose, cupulate when dry, dark brown to black, papillate, ostiolate. Ostiole central, short, lined with brown to hyaline periphyses. Peridium 26–45 μm diam., membranaceous, composed of brown to hyaline cells of textura angularis ( Fig. 2e ). Hamathecium comprising 2–4 μm wide, septate, filiform pseudoparaphyses, embedded in a gelatinous matrix. Asci 134–175.5 × 14–20 μm (x = 146.5 × 18 μm, n = 20), 8-spored, bitunicate, cylindrical, pedicellate, rounded at the apex, with a distinct ocular chamber. Ascospores 36.5–42 × 6–8.5 μm (x = 39 × 7.5 μm, n = 50), overlapping, initially hyaline, becoming light brown gradually from the middle to both ends at maturity, muriform, with 5–7 transverse septate and with 0–1 vertical septum in the central 2–4 cells, strongly constricted at the center, fusiform to subfusiform, slightly curved, smooth-walled, with rounded and paler ends. Asexual morph: Undetermined.

Material examined: – RUSSIA, Rostov Region, Shakhty City, near 20 th anniversary of Red Army Microdistrict (47.7064983˚N, 40.2663302˚E), on the ruderal meadow near pond, on dead stems of Achillea millefolium L. ( Asteraceae ), 21 May 2015, T. S. Bulgakov ( MFLU 15-2133, holotype), ibid. ( HKAS 96353, isotype).

Figures

FIGURE 2. Dematiopleospora fusiformis (MFLU 15-2133, holotype). a Herbarium label. b Herbarium specimen. c Appearance of ascomata on host. d Ascoma in vertical section. e Peridium. f Ostiole. g Pseudoparaphyses. h–j Asci. k–p Ascospores. Scale bars: d = 100 μm, e–f. h–j = 50 μm, g. k–n = 20 μm.