Myiodynastes is a genus of birds in the family Tyrannidae. Created by Charles Lucien Bonaparte in 1857, the genus contains five species which are collectively referred to as "sulphur-bellied flycatchers"; that name is also given to one of the individual species in the genus. The genus name Myiodynastes is a compound word composed from two Greek words: muia, meaning "fly" and dunastẽs, meaning "ruler".

List of species: The genus contains five species:

• Golden-bellied flycatcher (Myiodynastes hemichrysus)
• Golden-crowned flycatcher (Myiodynastes chrysocephalus)
• Baird´s flycatcher (Myiodynastes bairdii)
• Sulphur-bellied flycatcher (Myiodynastes luteiventris)
• Streaked flycatcher (Myiodynastes maculatus)