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 (2: British Columbia collections)
• Paleocene of the United Kingdom (1), United States (27: Montana, North Dakota, Wyoming)
Total: 30 collections including 31 occurrences