[2] The earliest representative of the group in the fossil record is probably Trichopitys from the Asselian (299-293 million years ago) of France.
The earliest representatives of Ginkgo, represented by reproductive organs similar to the living species, first appear in the Middle Jurassic, alongside other, related forms such as Yimaia and Karkenia, which have differently arranged reproductive structures and seeds associated with Ginkgo-like leaves.
The tracheids in the secondary xylem rays have pitting that occurs only on the walls and is circularly bordered.
Its historically wide territory makes it an important leaf morphology, and its unique stomata and isotopic profile give it a key role in recreations of the Mesozoic and Cenozoic.
There are similar, now extinct, morphogens, such as Sphenobaiera, which describes fan-shaped, deeply divided leaves without clear petioles.
The distinctive shape of the modern Ginkgo biloba gives the impression of a very narrow leaf morphology, but the group is varied and diverse.