Koordersiella javanica Höhn., Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 118: 833 (1909) Fig. 7
MycoBank number: MB 174412; Index Fungorum number: IF 174412; Facesoffungi number: FoF 06248;
Saprobic on leaves of Urostigma vogelii. Sexual morph: Ascomata 19–29 µm high × 28–30 µm diam. ( x = 23.7 × 29.3 µm, n = 20), regular, small, subglobose to globose, scattered, slightly carbonaceous. Peridium thick, carbonaceous and could not be observed. Hamathecium of filamentous, numerous, septate, branched, anastomosing trabeculate pseudoparaphyses. Asci 83–95 µm × 14–16 µm ( x = 89.4 × 15.7 µm, n = 20), 8-spored, fissitunicate, cylindrical to clavate, with a short pedicel or sessile, rounded at the apex, with an ocular chamber. Ascospores 18–20 µm × 3–5 µm ( x = 19.7 × 4.2 µm, n = 20), 2 or 3-seriate, straight or slightly curved, fusiform to cylindrical, spindle-shaped, and rounded at both ends or slightly pointed, 4–8 celled, multi-septate, hyaline, without a gelatinous sheath. Asexual morph: Undetermined.
Notes – The perithecial wall of Koordersiella javanica could not be observed from the specimen that we studied. However, from the original description, the peridium is described as ‘having a thickness of 20 to 25 μm on the top and 15 μm below, laterally 40 to 45 μm, multi layered with the inner layer comprising hyaline cells of textura angularis’. The perithecia are usually located on a very delicate, circular, different broad basal membrane (Hypothallus), which consists of thin delicate hyphae (Fig. 7).
Material examined – JAVA, Kulturtuin of Tjeukemeer near Buitenzorg, on leaves of Urostigma vogelii (Moraceae), 1 January 1993, F. Höhnel (FH 00301652, holotype).
Economic significance – None has been reported.
Figure 7 – Koordersiella javanica (FH 00301652, holotype). a Details of herbarium material. b, c Habit and appearance of ascomata on host surface. d Section of ascoma. e–g Asci. h, i Ascospores. Scale bars: b = 500 µm, c = 200 µm, d = 50 µm, e–g = 20 µm, h, i = 10 µm.