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General Description

 Colonies. Keratinophilic. On PYE with a daily growth rate of 2-2.7 mm in the dark at 28°C, white, felty, raised in the centre with a small crateriform portion, margin defined and regular, droplets of exudate present; reverse uncoloured, brown in the central area; at 37°C some strains showing restricted growth on PYE, reaching a diameter of 5-6 mm in 7 days. On YpSs with a daily growth rate of 3-4 mm in the dark at 28°C; white to tan due to the presence of numerous ascomata on the surface, powdery, flat, margin defined and regular, aerial hyphae present in the center; reverse brown; hyphae colourless, branched, smooth, septate, 1.7-3 μm broad, thin-walled. Conidia. Terminal and lateral, sessile or on short protrusions, solitary, colourless, smooth, clavate, 15-17.5 × 3.7-6 μm, thin-walled; intercalary conidia frequent, cylindrical, 11-15 × 4-5.5 μm. Ascomata. Maturing within 8-10 days at 28°C on YpSs, superficial, spherical, non-ostiolate, buff to light brown, 290-500 μm diam., glabrous; ascomatal wall 4-6 μm thick, composed of 2-4 layers of flattened, angular, rather thick-walled (0.5-2 μm), 5.5-6 × 10-12 μm cells. Asci. Subglobose to ellipsoidal, 8-spored, 9.5-11 × 7-9 μm, evanescent. Ascospores. Oblate, light brown, yellowish to pale brown in mass, one-celled, irregularly and discontinuously reticulate, 3.5-4.7 × 2.5-3.5 μm. 

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© Ahmed Abdel-Azeem

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