The monotypic group Yellow-margined Flycatcher (Yellow-winged) Tolmomyias assimilis flavotectus is recognized as a separate species, Yellow-winged Flycatcher Tolmomyias flavotectus; all remaining subspecies remain in Yellow-margined Flycatcher. Yellow-winged Flycatcher is basal to the rest of Tolmomyias, so retaining flavotectus in Yellow-margined Flycatcher would lead to a highly paraphyletic species (Harvey et al. 2020); flavotectus also is the most distinctive member of the Yellow-margined Flycatcher group vocally, although variation in vocalizations across this complex suggests that further splits may be warranted (Boesman 2016f).