Yuea chusqueicola O.E. Erikss., Mycotaxon 85: 314 (2003), Index Fungorum number: IF 371648
On culms of Chusquea cummingii Nees. Sexual morph: Ascomata 500–700 × 300–400 µm (x̄ = 678 × 355 μm, n = 10), individual ascomata seated in a separate cavity in the bamboo and covered by a thin crust of bamboo fragments, scattered, flattened, subglobose, non-clypeate, with a faint blackening zone around the ostiole, central ostiolar neck broad and short, with shiny black hymenium. Ostioles sometimes slightly papillate. Peridium 15–20 µm (x̄ = 17 μm, n = 10) wide, strongly compressed, thin-walled, outwardly comprising brown cell layers, inwardly hyaline cell layers. Hamathecium comprising sparsely branched paraphyses, less than 5 µm wide at the base, immersed in the gelatinous mass between asci. Asci 250–300 × 10–12 µm (x̄ = 285 × 11.5 μm, n = 20), 8-spored, unitunicate, cylindrical, short pedicellate, with J+, apical apparatus. Ascospores 25–32 × 8–10 µm (x̄ = 28 × 8.7 μm, n = 20), overlapping uniseriate, unicellular, brown, ellipsoidal-subcylindrical, equilateral or slightly inequilateral, terete or slightly compressed, apically rounded, sometimes attenuated towards one or both ends, smooth, aseptate, with few irregular oil droplets, with spiral germ slit, spiraling one full circumstance, 5 µm from the ends of spores, distinct, firm, with a 0.7 µm wide, gelatinous sheath. Asexual morph: Undetermined (re-described from Eriksson 2003).
Fig. 5. Yuea chusqueicola (redrawn from Eriksson (2003). a Ascomata in culms of Chusquea cummingii. b Ascus apex. c Ascospores with spiral germ slit. Scale bars: a = 10 mm, b, c = 30 µm.