Notes: Previously assigned to lineage Fusarium sp. nov. 12 (Laraba et al. 2021), F. amblysporum is here described from a set of strains previously stored in culture collections as either F. compactum, F. sambucinum or F. venenatum. Fusarium compactum, a member of the Fusarium incarnatum-equiseti SC produces similar PDA colonies to F. amblysporum, and all three species mentioned above produce wide (averaging > 5.4 µm wide) sporodochial conidia. Conidia of F. amblysporum, F. sambucinum and F. venenatum, however, all differ from those of F. compactum by being more uniform in shape, robust, with a less evident tapering. Fusarium amblysporum can be distinguished from its FSAMSC counterparts above, by its slightly faster growth rate and pigmentation on PDA, which can vary substantially from white to rosy buff, but not reaching the intense red colour observed in F. sambucinum and F. venenatum