- ... that the extinct plant genus Dillhoffia can't be placed into a flowering plant family at this time?
- ... that the extinct Miocene age maple Acer smileyi has been classified as closely related to the living Acer nipponicum (pictured)?
- ... that out of about 20,000 Clarno Formation fossils, only 5 were from the extinct dogwood Cornus clarnensis?
- ... that the extinct maple Acer dettermani is only known from the flank of a volcano?