Vertexicola caudatus Hyde et al.
Index Fungorum number: IF635172
Sexual morph: Ascomata 240-360 µm diam, globose to subglobose, superficial or semi-immersed, coriaceous, black and solitary. Necks 80-120 µm long, 40-60 µm diam, black, curving upwards and periphysate. Paraphyses 6 µm wide, hyaline and septate. Asci 170-290 ´ 7.5-12 µm, 8-spored, cylindrical, pedicellate, unitunicate, apically rounded, with a large J-, refractive and bi-partite apical ring, 4 µm long ´ 5 µm diam. Base of the ascus flask-shaped, with an elongate tail-like pedicel, comprising the inner ascus wall layer which encloses the epiplasm (TEM). Ascospores 18-24 ´ 6-9 µm, uni-seriate or overlapping uni-seriate, fusiform or ellipsoidal, hyaline, 5-distoseptate, thick-walled. Colonies on potato dextrose agar slow growing, reaching 1 cm diam after 30 d at room temperature (25 C), comprising cottony mycelium, superficial hyphae dark grey, growing in concentric rings, black on reverse. Asexual morph: Undetermined.
Specimen examined: CHINA, Hong Kong, Tai Po, Plover Cove Reservoir, submerged wood (Ranghoo et al.2000).
Fig. Vertexicola caudatus (Holotype). Interference light contrast micrographs. No. 1. Semi-immersed ascoma. No. 2. Immature ascus. No. 3, 4. Asci with large refractive apical rings. The ascospores are uni-seriate or overlapping uni-seriate in the asci. No. 5. Wide septate paraphyses. No. 6. Ascus base with an elongated tail-like pedicel (arrowed). No. 7-9. Distoseptate ascospores with thick-walls. Scale bars: 1 = 100 µm, 2-9 = 10 µm. (Photo grabbed from Hyde et al. 2000)