- Thus Altingiaceae and Iteaceae are monogeneric in some classifications.
- The recognition of Altingiaceae as a separate family received strong statistical support in 2008.
- Altingiaceae was usually not separated from Hamamelidaceae until phylogenetic studies showed that its inclusion might make Hamamelidaceae paraphyletic.
- Cercidiphyllaceae is now known to be a member of the woody clade of Saxifragales, along with Hamamelidaceae, Altingiaceae, and Daphniphyllaceae, but Trochodendraceae is in the basal eudicot order Trochodendrales.
- A total of 42 specimens in chert were studied by paleobotanists Kathleen Pigg, Stefanie Ickert-Bond, and Jun Wen, with their 2004 specific epithet " changii " as a patronym honoring the Chinese botanist and ecologist Hung-ta Chang, for his work with the family Altingiaceae and for describing the living species " Liquidambar acalycina ".