A quick look through Saxena and Trivedi's Catalogue of Tertiary spores and pollen from India for Dicolpopollis spp (dispersed pollen of Rattans) reveals many records from the Middle Eocene onward, but virtually no records from the Paleocene or Early Eocene (a couple of records such as 'Dicolpopollis spp, Paleocene-Eocene' for instance need to be checked out for both the actual age of the sediments and the attribution to Calamoidae) .

Rattan pollen first appears in the Maastrictian of the Horn of Africa, and is also present in the Paleocene of Sarawak, so the possibility needs to be raided that Calamoids dispersed into India from Asia following collision, and might therefore be an 'into India' immigrant!!  

The oldest records of Calamoid pollen in India therefore needs to be carefully checked to comfirm or refute the possible Middle Eocene first appearance