Class Dinophyceae Pascher (1914) Order Peridiniales Haeckel (1894) Family Peridiniaceae Ehrenb. (1831) Genus Calciodinellum Deflandre (1947) Calciodinellum elongatum (Hildebrand-Habel, Willems & Versteegh) Meier, Janofske & Willems (2002)