Raetiaedinium
Ramidinium
Raphidodinium
Renidinium
Resticulasphaera
Reticulatosphaera
Reutlingia
Rhabdothorax
Rhaetogonyaulax
Rhiptocorys
Rhombodinium
Rhynchodiniopsis
Riasanodinium
Riculacysta
Rigaudella
Ripea
Rivernookia
Romanodinium
Rosswangia
Rotosphaeropsis
Rottnestia
Rotundus
Ruegenia