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Family: PhacidiaceaeGenus: Phacidium
Anamorph: conidiomata 600-900 µm diam., black, roughly circular in outline with a central ostiole, stromatic, containing 2-3 pycnidial locules within a pseudoparenchymatous stromatic matrix. Conidiophores 10-25 x 2-2.5 µm, often branched, developing from the inner conidiomatal wall, bearing cylindrical conidiogenous cells 5-12 x 2-2.5 µm in size, thin-walled, smooth, proliferating percurrently. Conidia 12.5-15.5 x 2.5-3 µm, ± cylindrical, the apex and base obtuse, septate, hyaline, thin-walled, surrounded by a narrow gelatinous sheath that breaks and becomes everted at maturity to form a funnel-shaped apical appendage.
Teleomorph: ascomata apothecial, immersed, 350-500 µm diam., scattered or in clusters, stromatic, angular in outline, opening by 3-6 irregular radial teeth to expose the hymenium; the upper wall subepidermal, dark brown, lined with hyaline periphysis-like hyphae. Interascal tissue of ± unbranched paraphyses, immersed in a gelatinous matrix. Asci 62-75 x 11-13 µm, cylindric-clavate, short-stalked, fairly thin-walled and not fissitunicate, the apex obtuse with a small apical ring that blues in iodine, 8-spored. Ascospores arranged biseriately, 11-13 x 4.5-5 µm, ellipsoidal to fusiform-ellipsoidal, sometimes inaequilateral, hyaline, aseptate, fairly thin-walled, without a perispore or appendages.
Species do not appear to be host-specific, but their taxonomy is still uncertain.