Phylum Prymnesiophyta (haptophytes)
Parent taxon: Eukaryota according to E. Taylor et al. 2008
Sister taxa: Acritarcha, Allonema, Archaeplastida, Birrindudutuba, Changchengia, Chlorobiota, Chromalveolata, Chromista, Conglobocella, Dictyosphaera, Dinophyta, Euglenophyta, Filinexum, Gigantosphaeridium, Glossophyton, Kamolineata, Limbunyasphaera, Palaeosiphonella, Plantae, Protista, Protozoa, Rhizopodea, Sarcomastigophora, Satka, Siphonoseptum, Spiromorpha, Stramenopila, Tappania, Tuanshanzia, Valeria
Subtaxa: Coccolithophorales
Distribution: found only at AMNH no. 5555 specimen (Cretaceous of Nebraska)