Order Coccolithophorales (haptophytes)
Parent taxon: Prymnesiophyta according to E. Taylor et al. 2008
Sister taxa: none
Subtaxa: Caliptrosphaerites Clathrolithus Cylindrosphaera Pemma Peritrachelina Rhabdosphaerites
Distribution: found only at AMNH no. 5555 specimen (Cretaceous of Nebraska)