Eutiarosporella tritici
Eutiarosporella tritici (B. Sutton & Marasas) Crous, Phytotaxa 202(2): 85 (2015)
≡ Tiarosporella tritici B. Sutton & Marasas, Trans. Br. mycol. Soc. 67(1): 74 (1976)
Sexual morph: undetermined. Asexual morph: Conidiomata 200–900 µm diam., 170–850 µm high, brown to dark brown or black, pycnidial, single or up to 5 aggregated in large, pulvinate, botryose, superficial or partly immersed at basal stroma, subglobose, cylindrical to subcylindrical, or irregular in shape, slightly swollen at the base or level of the locule, narrow towards the apex, unilocular, covered by hyphae, with cylindrical, straight or slightly curved neck, ostiolate. Ostiole 130–350 × 70–140 µm, single, cylindrical to subcylindrical, centrally located. Hyphae hyaline to pale brown, septate, cylindrical, simple, straight or flexuous, smooth or verruculose, arising from upper layers of conidiomata. Conidiomatal wall 50–80 µm wide, composed of dark brown to pale brown, thick-walled cells of textura angularis in the outer layers, and hyaline, thick-walled cells of textura prismatica in the inner layers. Conidiophores formed lining the innermost layers of conidiomata, reduced to conidiogenous cells or distinct, when present, hyaline, dolliform, unbranched, septate, smooth-walled. Conidiogenous cells 10–20 × 3–5 µm, hyaline, enteroblastic, phialidic, subcylindrical, occasionally broad at base, straight or slightly curved, thick- and smooth-walled. Conidia 24–35 × 6.5–15 µm ( x = 30 × 11 µm; n = 30) (excluding the sheath), hyaline, fusiform, broad at middle part, unicellular, mostly straight, thick-walled, surrounded by a 1–3 µm wide sheath except both ends, bearing hyaline, flame-like, or circular sector-like mucoid appendage only at apex or both ends (10–35 × 8–22 µm).
Material examined: South Africa, Orange Free State, Heilbron, on Triticum aestivum (Poaceae), 18 January 1973, W.F.O. Marasas (PREM 44966, holotype).
Eutiarosporella tritici (PREM 44966, holotype) a, b Herbarium specimen. c, d Appearance of brown conidiomata on the host. e, f Vertical section of conidiomata (e in 10% KOH, f in lactic acid). g upper locule. h Section of peridium. i Mycelium on the surface of conidioma. j–n Conidiogenous cells and developing conidia. o–t Conidia. Scale bars c = 1000 µm, d = 500 µm, e–f = 200 µm, g = 100 µm, h–i = 50 µm, j–t = 10 µm.
References:
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.
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