Aspergillus athecius Raper & Fennell 1965

Egypt.

Colonies. On Czapek's solution agar growing well at room temperature (24-26°C), reaching 5-6 cm. diam. at 3 weeks, with thin submerged mycelium giving rise to a loose surface growth of tufted encrusted mycelium 2-3 mm. deep, at first near straw-yellow and later cream-buff, with marginal zone irregular and almost entirely submerged but producing scattered tufts of loose aerial growth; conidial heads gray-tan, rather limited in number, usually borne within the aerial mycelium and little influencing the colony appearance; spiral coils of thickened hyphae similar to the cleistothecial initials of teleomorphic members of the Aspergillus glaucus group abundant throughout; reverse in dull yellow shades; on malt extract agar similar to those on Czapek in texture and rate of growth but with surface development continuous to the margins, colour remaining near straw-yellow due to the almost complete concealment of the conidial heads within the tufted mycelium, otherwise as on Czapek; on Czapek's agar + 20% sucrose rapidly growing, reaching 6-7 cm. diam. at 3 weeks, producing a more compact, less tufted surface growth than on the two preceding media but with colour similar to that on Czapek's agar; conidial structures produced more abundantly; reverse deep yellow-brown; on M40Y agar similar to those on Czapek-20% but producing abundant large conidial heads on relatively long stalks projecting above the mycelial layer and giving the colonies their characteristic wood-brown to buffy -rown colouration. Anamorph. Conidial heads loosely radiate, up to 500 μm diam. Conidiophores. Smooth, uncoloured or internally brownish orange with pigmentation confined to the apical portion or extending throughout the entire length, mostly 600-1000 μm × 15-20 μm diam. just below the vesicle, tapering toward the base, occasionally branched; vesicles globose to subglobose, coloured as the stalk, when non-pigmented collapsing easily, mostly 20-40 μm diam. Conidiogenous cells. In a single series, collapsing quickly, mostly 8-10 × 4.0-5.0 μm, more or less coloured. Conidia. Conspicuously echinulate, almost cylindrical to pyriform or elliptical when first formed, usually remaining ovate to elliptical but occasionally becoming subglobose, variable in size, mostly 6.0-8.0 × 5.0-6.5 μm. Ascomata. Not observed. Asci. Occurring in naked clusters of up to 12-15 × 8-10 μm diam., apparently developing directly in the ascogonial coil and with the adjacent mycelium remaining undifferentiated. Ascospores. Seldom observed outside the asci, but appearing lenticular, smooth, heavy walled with only a trace of an equatorial furrow and no crests, 5.5-6.5 × 4.5-5.0 μm, in pattern suggestive of Aspergillus repens.

Aspergillus athecius je grzib, co go ôpisoł Raper & Fennell 1965. Aspergillus athecius nŏleży do zorty Aspergillus i familije Trichocomaceae. Żŏdne podgatōnki niy sōm wymianowane we Catalogue of Life.