Parent taxon: Dicotyledones according to F. H. Knowlton 1919
See also Hickey 1977 and MacGinitie 1941
Sister taxa: Anisophyllum, Araliopsoides, Asteridae, Campanulales, Campanulatae, Caryophyllidae, Casuarinales, Centrospermae, Chenopodiales, Chitaleypushpum, Chitaloxylon, Contortae, Cremocarpon, Deccanocarpon, Deccanophyllum, Dicotylirhizos, Dicotylophyllum, Dilleniidae, Ebenales, Ericales, Furcula, Hamamelidae, Harrisocarpon, Juglandales, Lauriphyllum, Lecythioxylon, Menispermophyllum, Miconiiphyllum, Mohgaoanthus, Myricales, Myrtales, Myrtiflorae, Oleales, Ordinicutis, Papaverales, Platanales, Polemoniales, Polygonales, Primulales, Quadricolpites, Ranales, Raoanthus, Retiacolpites, Rhamnales, Rosidae, Rubiales, Sahnianthus, Sahniocarpon, Salicales, Sarraceniales, Stephanocolpites, Thymeleales, Triorites, Triporocolpatus, Tubiflorae, Umbellales, Umbelliflorae, Urticales, Wingospermocarpon
Subtaxa: Ternstroemiaceae
Ecology: "photoautotroph"
Distribution:
• Oligocene of Germany (1 collection)
• Eocene of Germany (1), United States (6: North Dakota, Texas, Washington, Wyoming)
• Clarkforkian of United States (8: Wyoming)
• Paleocene of United States (2: Montana, Wyoming)
• Cretaceous of Canada (6: British Columbia)
Total: 24 collections including 26 occurrences