Parent taxon: Eukaryota according to E. Morycowa et al. 2001
Sister taxa: Acritarcha, Allonema, Archaeplastida, Birrindudutuba, Changchengia, Chlorobiota, Chromalveolata, Chromista, Conglobocella, Cucumiforma, Dictyosphaera, Dinophyta, Euglenophyta, Filinexum, Gigantosphaeridium, Kamolineata, Leiothrichoides, Limbunyasphaera, Palaeosiphonella, Plantae, Protista, Protozoa, Prymnesiophyta, Rhizopodea, Satka, Sinosabelliditida, Siphonoseptum, Soldadotubulus, Spiromorpha, Stramenopila, Tappania, Tuanshanzia, Valeria, Waltheria
Subtaxa: Catinaster Nemkovella Praedorothia
Distribution:
• Quaternary of South Pacific (1 collection)
• Miocene of Indian Ocean (59), Indonesia (1), North Atlantic (1), North Pacific (66), South Pacific (7)
• Eocene of Italy (2)
• Paleocene to Eocene of North Atlantic (1)
• Paleocene of North Atlantic (8)
• Cretaceous of Spain (2)
Total: 148 collections including 194 occurrences