First Record of Two Egyptian Fungal Genera; The Myxomycete: Lepidoderma carestianum and the Ascomycete: Arthrinium bambusicola

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Abstract Background: Slime molds (Myxomycetes) considered a separate group of protozoal organisms, related to rhizopoda and primitive fungi. They are characterized by forming large multinuclear plasmodia devoid of cell walls and their complex life cycles. On the other hand, ascomycetous fungi are considered large group which includes diversity of fungal genera ranged between pathogenic and saprophytic habitat. Results: The tested fungi, Lepidoderma carestianum which belongs to (Myxogastria, Amoebozoa) and the ascomycetous fungus; Arthrinium bambusicola were recorded for the first time in Egypt. Detailed morphological description and microscopic examination for these fungi were exhibited in this study. Conclusions: Sporocarp of L. carestianum was appeared at cold climate at November 2021 on the surface of cultivated soil while, A. bambusicola was isolated from dead branch of Melia azedarach tree on PDA medium as a saprobe. The most obvious feature of the isolate colony was the presence of the black colour regions due to conidiomata embedded in the white mycelia. The fungal conidia are distinguished by dark brown colour, oval shaped with tapered ends. The definition of the tested Lepidoderma and Arthrinium species was confirmed by molecular characterization using COIF1/COIR1 primers for Lepidoderma and ITS1 and ITS4 primers for Arthrinium.

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