Diagnosis | Holectypidae with:
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Range | Early Cretaceous (Aptian) to Late Cretaceous (Maastrichtian); worldwide. |
Remarks | Although a couple of species of Discoidinae have all five genital plates perforated by gonopores, these have well developed internal buttressing and clearly have evolved a fifth gonopore independently. Coenholectypinae lack internal buttressing and evolved from taxa currently placed within the genus Holectypus. |