Editing Platanaceae (section)

== Fossils ==
A large number of fossils of this family have been recorded from the Lower [[Cretaceous]] (98-113 million years ago, ''Platanocarpus''). The examples from that time had very small pollen (8-10 μm) and a developed perianth and they lacked hairs at the base of the nucule.  It is thought to have had [[Entomophily|entomophilous]] pollination. During the mid Cretaceous, the fossilized forms with platanoid leaves became mixed with pinnate leaves (''Sapindopsis'') or pedatisect leaves (''Debeya'', ''Dewalquea''), and these forms lasted until the [[Eocene]]. The leaves with typical stipules belonging to the sub-genus ''Platanus'' are very common in [[Palaeocene]] formations (60 M years ago). It is thought that the only modern genus, ''Platanus'', is a [[Relict (biology)|relict]] that can be considered a [[living fossil]]. It must have been [[polyploid]] during its evolution judging by the size of its stomata.