Family Gonyaulacaceae diagnosis

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Family Gonyaulacaceae

Citation: Gonyaulacaceae Lindemann 1928.

Diagnosis:Gonyaulacineans in which the sulcus is more or less midventral and may be straight, oblique from upper right to lower left, or sigmoidal. The antapical outline is more or less symmetrical and strong dorsoventral compression is lacking. There are six precingular plates.