cryptomonads see Order Cryptomonadales Pascher (1913)
   heterotrophic cryptomonads
     1 Genus Goniomonas F. Stein (1878)
     2 Genus Chilomonas Ehrenb. (1831)
     3 ?Genus Platychilomonas Larsen & Patterson, 1990
     4 ?Genus Protocryptomonas B.V. Skvortzov, 1960 ex B.V. Skvortzov, 1969