Osservazioni comparative sulle specie del genere Malbranchea

Summary The comparative study of Malbranchea pulchella, M. Bolognesii-Chiurcoi (two strains) and M. Kambayashii (the two last named species also on original strains) adscertained the identity of species. In spite of superficial analogies with the thallospores (arthrospores) of Actinomyces and Geotrichum, the sporulation in Malbranchea ends to the formation of true conidia; through the generation of a proconidium allied to the same organ of Sporendonema. Between true arthrospores and true conidia intermediate morphologies are recognizable in many genera. The generation of the proconidium and the schizogenese of conidia may be interpreted as a pseudo-endosporulation, not a true endosporulation. The affinities with Helicosporous fungi are only superficial.