Diagnosis:Peridiniaceans in which the middorsal anterior intercalary plate is quadra (i.e. four-sided).
Apectodinium ( ERROR bib319.htm for Costa and Downie, 1976) ERROR bib1171.htm for Lentin and Williams, 1977b; Early Eocene. Charlesdowniea ERROR bib1165.htm for Lentin and Vozzhennikova, 1989; Early Eocene. Dracodinium ERROR bib721.htm for Gocht, 1955; Eocene-Oligocene. Kisselevia ERROR bib1959.htm for Vozzhennikova, 1963 ex ERROR bib1961.htm for Vozzhennikova, 1967; Eocene.
Rhombodinium ERROR bib721.htm for Gocht, 1955; Mid Oligocene. Wetzeliella ERROR bib568.htm for Eisenack, 1938b; Late Eocene-Early Oligocene.
Wilsonidium ERROR bib1169.htm for Lentin and Williams, 1976; Late Eocene.
Parent: Family Peridiniaceae part 1