Peridiniales is an order of dinoflagellates. Below is a uncritical list of the families in Peridinales, but molecular phylogenetics circumscribe the group in a stricter sense. * , * , * , * , * Ceratiaceae, * , * , * , * , * , * , * , * , * , * , * syn. Heterocapsineae * , * , * Kryptoperidiniaceae, * , * , * , * Peridiniaceae, * , * , * Polykrikaceae, * , * , * , * Protoperidiniaceae, * , * , * , * , *