Coryphoideae
…leaf folds (excepting Guihaia), while Calamoideae palms have reduplicate (inverted V-shaped) leaf folds. Pinnate leaves do occur in Coryphoideae, in Phoenix, Arenga, Wallichia and bipinnate in Caryota. Coryphoids are well-represented in the fossil record from the Late Cretaceous (Campanian) onwards, primarily…