Xylariales » Xylariales genera incertae sedis » Neoanthostomella

Neoanthostomella viticola

Neoanthostomella viticola Daranag., Camporesi & K.D. Hyde, in Daranagama, Camporesi, Jeewon, Liu, Stadler, Lumyong & Hyde, Cryptog. Mycol. 37(4): 524 (2016)

Index Fungorum number: IF 552248; Facesofungi number: FoF 02392

Saprobic on dead branch of Vitis vinifera L. Sexual morph: Ascomata 160–203 × 180–225 μm, immersed, conical-irregular-shaped areas, black, coriaceous, clustered, rarely solitary, in cross section globose, with wide ostiolar neck. Ostiole 82–110 μm diam. at the base × 50–66 μm high, grey, papillate, with a central periphysate ostiolar canal. Clypeus black, thick-walled, margin indistinct, mixed with dark, fungal hyphae in host cell layers. Peridium 34–53 μm wide, with two cell layers, outwardly comprising thick-walled, compressed, light brown cells of textura irregularis and inwardly comprising thick-walled, several layers of hyaline cells of textura angularis. Paraphyses 2.5–3.4 μm wide at base, slightly longer than the asci, numerous, filamentous, septate. Asci 85–117 × 5–7 μm, 8-spored, unitunicate, cylindrical, long pedicellate, without a visible apical ring, sometimes with apical thickenings. Ascospores 5.7–11 × 3.4–4.8 μm, uniseriate-overlapping uniseriate, unicellular, ellipsoidal, with broad ends, light brown, smooth-walled, lacking a germ slit. Asexual morph: Hyphomycetous. Conidiophores 60–80 × 5–8 μm, macronematous, septate, densely branched in the upper part, hyaline, smooth. Conidiogenous cells 9–12 × 3–6 μm, phialidic, with an apical collarette, cylindrical, slightly wider at the base, hyaline, smooth. Conidia 5–8 9 4–6 μm, hyaline, globose to ellipsoidal, slightly verruculose.

Material examined: ITALY, Province of Forlı`-Cesena, Trivella di Predappio, on dead branch of Vitis vinifera L. (Vitaceae), 31 Dec. 2014, Erio Camporesi, IT 2326 (MFLU 15–0691, holotype), ibid. (HKAS 95066, isotype), ex-type living cultures MFLUCC 16–0243, KUMCC.


Notes: Neoanthostomella viticola is the second species included in the genus (Daranagama et al. 2016e). It bears similar characters to A. variabilis B.S. Lu & K.D. Hyde such as its smooth-walled, light brown, ellipsoidal ascospores and cylindrical, slender asci. However, A. variabilis has long, periphysate ostiolar canal, which is unique to the species. Neoanthostomella viticola differs from N. pseudostromatica by having smaller, pale brown ascospores without a mucilaginous sheath. In addition, N. viticola produced a hyphomycete asexual morph in culture, while an asexual morph has not been determined in N. pseudostromatica. Currently, in updated classification by Wijayawardene et al. (2020) assigned Neoanthostomella into Xylariales genera incertae sedis.