Citation: Goniodomoideae (Autonym).
Diagnosis: Goniodomaceans in which the posterior sulcal homologue is external to the sulcus. The cell is not compressed anteriorly-posteriorly. Cysts, where developed, are of dinosporin. The first apical homologue is exsert. Type genus: Extant genera:
?Pachydinium Pavillard 1915.
Heteraulacacysta Drugg and Loeblich Jr. 1967; Mid Eocene.
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