Subclass Peridiniphycidae
From dinoflaj2
| Dinophyceans with a tabulation which accords with, or derives from, a pattern in which there are five or six latitudinal plate series. A sagittal suture is lacking. | ||
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| Plate 1\' symmetrical; one fundital plate ( antapical plate) is clearly in a more dorsal position than other(s). | UNCERTAINS | Plate 1\' symmetrical; two fundital plates ( antapical plates) symmetrical, neither being clearly dorsal of the other. |
| GONYAULACALES | PERIDINIALES | |
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