Aspergillus fasciculatum n. sp. has been found as contaminant of Lab. cultures, on 30.10.1952 and again on 29.9.1954. It grows well in Czapek neutral agar, as well as in Malt agar and Potato-dextroseagar, less intensively in Corn steep agar.
Other media have not been tried so far.
It presents conidiophores smooth or rough, yellowish, septated or not, undivided or branching at the apex, supporting then 2 vesicles or yet with the apex trifurcated or turning into branches, each swelling to form vesicles, side by side, with single head conidiophores.
Abnormal structures in which the sterigma becomes a second conidiophore with a vesicle, were found very common. Normal structures present vesicles with two and one series of sterigmata.
Having its connections within the Flavus-oryzae group, by these outstanding characteristics not reported before, it was considered a new species.
Os autores agradecem aD. Marilene Maranhão Moreira, a colaboração prestada no curso dêste trabalho.