Fusarium nelsonii and F. musarum: two new species in section Arthrosporiella related to F. camptoceras

An emended description of Fusarium camptoceras is provided to include the presence of pedicellate macroconidia produced in sporodochia and mesoconidia produced on polyblastic conidiogenous cells in the aerial mycelium. Two new Fusarium species morphologically related to F. camptoceras in Section Arthrosporiella are described and illustrated. Fusarium nelsonii sp. nov. was isolated mainly from plant debris in soil and some other sources in South Africa, and differs from F. camptoceras primarily in the presence of red pigment on PDA, shorter macroconidia and mesoconidia with fewer septa and in the production of characteristic terminal pairs of chlamydospores. Fusarium musarum sp. nov. was isolated from banana fruit in Central America and differs from F. camptoceras primarily in the presence of red pigment on PDA, longer mesoconidia with more septa, and the absence of both sporodochia and pedicellate macroconidia.