Subfamily Helgolandinioideae

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Subfamily Helgolandinioideae

Citation: Helgolandinioideae Fensome et al., 1993b.

Diagnosis:Goniodomaceans with either or both of the following characters: 1) the tabulation has more than the typical goniodominean number of plates in at least two plate series; 2) within the life-cycle there is a nonpreservable smooth cellulosic cyst with a chasmic archeopyle.

Type genus:Extant genera:Fossil genus:

Parent: Family Goniodomaceae part 1