Pleosporales » Testudinaceae » Angustospora

Angustospora nilensis

Angustospora nilensis Abdel-Aziz, in Li et al., Fungal Diversity 78: 10.1007/s13225-016-0366-9, [54] (2016).

            Index Fungorum number: IF 551715; Facesoffungi number: FoF 01633, Fig. 1

Description: see Li et al. (2016).

Saprobic on decayed submerged wood in freshwater habitats. Sexual morph: Ascomata 230–440μm high, 330–400 μm diam., globose to subglobose, immersed to erumpent, solitary, ostiolate, papillate, periphysate, coriaceous to sub-carbonaceous, dark-brown to black. Papilla 105–170 μm long, 115–160 μm wide, protruding above the wood surface. Ostiolar canal 150– 300 μm long, 80–160 μm wide, cylindrical to triangular, filled with periphyses that are 25 to 50 μm long and 2–3 μm wide. Peridium 60–85μm thick, comprising two strata; outer stratum 39–54 μm thick, dark-brown to black, forming a textura angularis; inner stratum 18–30 μm thick comprising hyaline, thick-walled, flattened cells, arranged in a textura angularis. Hamathecium comprising numerous, 1–2.5 μm wide, distantly septate, branched, trabeculate pseudoparaphyses, embedded in a gelatinous matrix, anastmosing above the asci. Asci 150– 240 × 48–83 μm ( x= 193.9 × 59.9 μm, n = 10), 8-spored, bitunicate, fissitunicate, clavate, semi-persistent, short pedicellate, apically rounded, with a wide, shallow ocular chamber and faint ring. Ascospores 45–68 × 26–35μm (x = 58.6 × 30μm, n= 50), overlapping biseriate, dark-brown to black, (3)–5–(7)- septate, polar cells are lighter when young and apical cells with two-walls, surrounded by thin gelatinous, striate layer. Asexual morph: Undetermined.

Material examined: Egypt, Sohag City, on decayed wood submerged in the River Nile, 8 March 2005, F.A. Abdel-Aziz (MFLU 15-1511, holotype).

Notes:  The holotype material examined was quite in poor condition and we could not observe the asci. For complete illustration, see Li et al. (2016).