Caddasphaera
Cadosina
Calcicarpinum
Calcigonellum
Calciodinellum
Calciogranellum
Calciperidinium
Calcipterellum
Calcisphaerellum
Calcisphaerula
Caledonidinium
Calicipedinium
Caligodinium
Callaiosphaeridium
Canningia
Canninginopsis
Cannosphaeropsis
Cantulodinium
Capillicysta
Capisocysta
Carduifolia
Carinasphaera
Carinellum
Carnarvonodinium
Carpatella
Carpathodinium
Carpistomiosphaera
Carpodinium
Cassiculosphaeridia
Cassidium
Catastomocystis
Cauca
Cauveridinium
Centosphaera
Cepadinium
Ceratiopsis
Cerbia
Cerebrocysta
Cernicysta
Cerodinium
Chaenosphaerula
Charlesdowniea
Chatangiella
Chelinocysta
Chichaouadinium
Chiropteridium
Chlamydophorella
Chlonoviella
Chytroeisphaeridia
Ciliosphaeridium
Cinctactiniscus
Circulodinium
Cirrusphaera
Cladopyxidium
Clathroctenocystis
Cleistosphaeridium
Coccopterum
Codonia
Codoniella
Colomisphaera
Colonsaydinium
Cometodinium
Committosphaera
Comparodinium
Compositosphaeridium
Compositosphaeridium
Conejoconus
Congruentia
Conicoidium
Coniferatium
Conneximura
Conosphaeridium
Cooksonidium
Cooksoniella
Corculodinium
Cordosphaeridium
Cordosphaeridium subgenus Cordosphaeridium
Cordosphaeridium subgenus Tarimocystium
Cornudinium
Coronadinium
Coronifera
Corradinisphaeridium
Corrudinium
Costacysta
Cousteaudinium
Craspedodinium
Cribroperidinium
Cristadinium
Crussolia
Crustocadosina
Cryptarchaeodinium
Ctenidodinium
Cubiculosphaera
Cubodinellum
Cyclapophysis
Cyclonephelium
Cylindrodinellum
Cymososphaeridium
Cystodiniopsis
Cystodiniopsis