Nitripervalida that have two holes, but the main oral grove is shaped and smaller than usual Duoforaminis Nitri. Believed to be the chain between the evolution from Duoforaminis to Opertoforaminis.
Figuraforaminis
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Nitripervalida that have two holes, but the main oral grove is shaped and smaller than usual Duoforaminis Nitri. Believed to be the chain between the evolution from Duoforaminis to Opertoforaminis.