Saeptodinium
Sahulidinium
Samlandia
Sanshuia
Saturnodinium
Satyrodinium
Saumuria
Saxodinium
Schematophora
Schizosphaerella
Scriniocassis
Scriniodinium
Scriniodinium subgenus Endoscrinium
Scriniodinium subgenus Scriniodinium
Selenopemphix
Sembaridinium
Semicavidinium
Senegalinium
Senoniasphaera
Sentusidinium
Sepispinula
Septiareata
Seriliodinium
Shublikodinium
Silicisphaera
Sinocysta
Sirmiodiniopsis
Sirmiodinium
Sliteria
Smolenskiella
Soaniella
Sokolovidinium
Songiella
Speetonia
Sphaerodinella
Spinidinium
Spiniferella
Spiniferites
Spiniferopsis
Spongiosphaeriodinium
Spongodinium
Stanfordella
Stelladinium
Stenopyxinium
Stephanelytron
Stephodinium
Stiphrosphaeridium
Stomiosphaera
Stomiosphaerina
Stomodinium
Stoveracysta
Subathua
Subtilidinium
Subtilisphaera
Suessia
Suibindia
Sumatradinium
Surculosphaeridium
Susadinium
Svalbardella
Svenkodinium
Sverdrupiella
Systematophora