Pleosporales » Leptosphaeriaceae » Subplenodomus

Subplenodomus galiicola

Subplenodomus galiicola Phukhams., Tibpromma, Camporesi & K.D. Hyde [as 'galicola'], in Tibpromma et al., Fungal Diversity 83: 85 (2017)

Nomenclatural changes applied in Index Fungorum

Index Fungorum number: IF 631312; Facesofungi number: FoF 2778

            Etymology: The species epithet refers to the host.

Holotype: MFLU 15-1368

Saprobic on dead stem of Galium sp. Sexual morph: Ascomata 254–285 μm high × 311–314 μm wide diam. (x̄ = 269 × 313 μm, n = 5), solitary, scattered or sometimes gregarious in small groups, immersed under epidermis layer, superficial on host surface, depressed-globose, ampulliform, base flat, dark brown to brown, coriaceous, ostiole central. Ostioles 70–98 μm high × 98–117 μm diam. (x̄ = 87 × 104 μm, n = 5), papillate, shiny, brown to reddish-brown, smooth, filled with periphyses. Peridium 32–60 μm wide, up to 75 μm at ostiole part, thick, outer region of heavily pigment cells, outer layer of 8–10 layers of black to dark-brown cells of textura angularis, inner layer composed of thick-walled, hyaline, angular cells. Hamathecium comprising numerous, long, 1.5–2.8 μm (x̄ = 2 μm, n = 50) wide, broad, transversely septate, branched, cellular pseudoparaphyses. Asci 66–120 × 12–17 μm (x̄ = 98 × 14 μm, n = 20), 8-spored, bitunicate, broad cylindrical, with club-shaped pedicel, apically rounded, ocular chamber visible when immature. Ascospores 30–40 × 6–9 μm (x̄ = 37 × 7 μm, n = 50), overlapping biseriate, pale brown, broad fusiform, tapering at the ends, with (3)–4 transverse septa, slightly constricted at the septa, enlarged at the second cell from apex, wall rough, indentations present when mature. Asexual morph: Undetermined.

Material examined: ITALY, Forlı`-Cesena [FC], Tontola di Predappio, on dead stem of Galium sp., 4 April 2014, Erio Camporesi, IT 1797 (MFLU 15-1368, holotype).

GenBank Numbers LSU:KY554199, ITS:KY554204.

Notes: Subplenodomus galicola is similar to other Subplenodomus species in its pseudoparenchymatous peridium cell types (De Gruyter et al. 2013). Subplenodomus galicola also shares similarities with Plenodomus in its cylindric asci and yellowish ascospores with 3–5 transverse septa. However, they are distinct, as the ascomata of S. galicola are, superficial, whereas Plenodomus has immersed to erumpent ascomata (Ariyawansa et al. 2015). Currently, the species of Subplenodomus are known from herbaceous plants or woody dicotyledonous trees (De Gruyter et al. 2013).