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Family: HyaloscyphaceaeGenus: Hyphodiscus
Anamorph in culture: vegetative hyphae hyaline, 1.0–4.0 µm diam, accumulating an orange or red pigment particularly on modified Leonian’s agar. Conidiomata and conidiophores absent. Conidiogenous cells 10–30 x 2.5–3.5 µm, arising terminally or laterally from undifferentiated hyphae, solitary or in groups of 2–3, cylindrical to ampulliform, tapering towards the apex, hyaline, proliferating percurrently, the collarette cylindrical and only slightly flared apically, 2–3 µm long. Conidia 2.5–3.5(–4.5) x 1.5–2.5 µm, cuneate to dacryoid with a truncate base, hyaline, forming long chains at the apices of the phialides and sticking together when dislodged. Chlamydospores not observed.
Teleomorph: ascomata apothecia, scattered to gregarious, sessile or shortly stipitate. Disc 200–300 (to 400) µm diam, initially deeply cupulate and later broadening to become shallowly cupulate, pale orange to ochraceous; the margin slightly elevated, concolorous, occasionally paler, appearing pruinose due to excipular hairs. Ectal excipulum textura prismatica, composed of thin-walled cells 7–16 x 3–7 µm in size, arranged almost perpendicular to the surface at the margin, becoming thicker-walled (up to 2µm), almost agglutinated, and more intricate toward the base. Hairs typically clavate, occasionally cylindrical with obtuse tip, to 35µm long, 2–5µm diam, sometimes irregularly expanded, thin-walled, aseptate or 1 to 2–septate, hyaline to pale brown, not stained by Melzer’s solution, with coarse granules covering the apical cell or sometimes two cells at the apex. Asci (25–)30–50 x 4–7µm, cylindric-clavate, sometimes long-stipitate, arising from croziers, the apex rounded, the pore small, staining blue in iodine after after pretreatment in 3% KOH, 8-spored. Ascospores 4–6 x 2–2.5 µm, ellipsoidal to narrowly ovoid, almost symmetrical, aseptate, hyaline, smooth. Interascal tissue of simple paraphyses, 1.5–2 µm diam, cylindrical, flexuous, simple or branched at the base, usually aseptate, the apex rounded, as long as the asci.