Subfamily Coryloideae Koehne 1893 (birch)
Angiospermae - Fagales - Betulaceae
Parent taxon: Betulaceae according to P.R. Crane 1981
Sister taxa: Alnipollenites, Alnites, Alnites, Alnophyllum, Alnoxylon, Alnus, Betula, Betulapollenites, Betuliphyllum, Betulites, Betuloxylon, Carpinicarpus, Carpinoxylon, Carpinus, Corylites, Coryloxylon, Corylus, Cranea, Eucarpinoxylon, Hooleya, Ostrya, Ostryoxylon, Polyporopollenites, Triporatus
Subtaxa: Craspedodromophyllum Palaeocarpinus
Ecology: "photoautotroph"
Distribution:
• Eocene of Canada (1: British Columbia collection)
• Clarkforkian of United States (17: North Dakota, Wyoming)
• Paleocene of the United Kingdom (1), United States (10: Montana, Wyoming)
Total: 29 collections including 30 occurrences