Subfamily GonyaulacoideaeCitation: Gonyaulacoideae (Autonym).
Diagnosis:Gonyaulacaceans with an S-type ventral organization, typically neutral torsion and three or four climactal plates excluding small dorsal anterior intercalary plates (so-called "incidental plates"), where present. Of these climactal plates, the first apical homologue (*1\') is reduced or absent. There are six Kofoid precingular plates.
Type genus:Extant genera:Fossil genera:
Achomosphaera Evitt, 1963; Late Cretaceous.
Ataxiodinium Reid, 1974; Holocene.
?Avellodinium Duxbury, 1977; Cretaceous (Berriasian-Barremian).
Bitectatodinium Wilson, 1973; Mid Pleistocene.
?Cannosphaeropsis O. Wetzel, 1933b; Cretaceous (Senonian).
?Catastomocystis C. Singh, 1983; Cretaceous (Cenomanian).
Chaenosphaerula Damassa, 1997; Late Oligocene.
Corrudinium Stover and Evitt, 1978; Oligocene.
Dalella McMinn and Sun Xuekun, 1994; Holocene.
Daveya Monteil, 1996; Cretaceous (Ryazanian).
?Ectosphaeropsis Londeix and Jan du Chêne, 1988; Miocene (Burdigalean).
Edwardsiella Versteegh and Zevenboom in Versteegh, 1995; Oligocene-Pliocene (Chattian-Piacenzian).
Evittosphaerula Manum, 1979; Mid Oligocene-Early Miocene.
Exiguisphaera Duxbury, 1979a; Cretaceous (Hauterivian).
Flandrecysta Slimani, 1994; Cretaceous (Campanian-Maastrichtian).
Hafniasphaera Hansen, 1977; Paleocene (Danian).
Hystrichosphaeropsis Deflandre, 1935; Cretaceous (Senonian).
?Hystrichostrogylon Agelopoulos, 1964; Late Eocene.
Impagidinium Stover and Evitt, 1978; Late Eocene.
Nematosphaeropsis Deflandre and Cookson, 1955; Holocene.
?Okerisphaeridium Kunz, 1990; Jurassic (Oxfordian)
Pentadinium Gerlach, 1961; Mid Oligocene-Mid Miocene.
Piccoladinium Versteegh and Zevenboom in Versteegh, 1995; Oligocene-Pliocene (Chattian-Piacenzian).
Prionodinium Leffingwell and Morgan, 1977; Cretaceous (Neocomian).
Psaligonyaulax Sarjeant, 1966b; Cretaceous (Cenomanian).
Pterodinium Eisenack, 1958a; Cretaceous (Aptian).
Rottnestia Cookson and Eisenack, 1961b; Early Oligocene.
Seriliodinium Eaton, 1996; Pliocene-Pleistocene.
Spiniferites Mantell, 1850; Late Cretaceous.
Tectatodinium Wall, 1967; Miocene-Holocene.
Trabeculidium Duxbury, 1980; Cretaceous (Barremian).
?Triblastula O. Wetzel, 1933b; Late Cretaceous.
Tubotuberella Vozzhennikova, 1967; Late Jurassic.
Turnhosphaera Slimani, 1994; Cretaceous (Santonian).
Unipontidinium Wrenn, 1988; Mid Miocene.
Wilsonisphaera Slimani, 1994; Cretaceous (Senonian).
Wrevittia Helenes and Lucas-Clark, 1997; Cretaceous (Neocomian-Aptian).
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Parent: Family Gonyaulacaceae