[['''Calamopityales]]''' adalah [[ordo]] tumbuhan yang sudah punah merujuk pada [[Pteridospermatophyta]], atau pakis biji.<ref name="Taylor 09">{{cite book|author1=Taylor, Edith L. |author2=Taylor, Thomas N. |author3=Krings, Michael |title=Paleobotany: The Biology and Evolution of Fossil Plants|publisher=Academic Press|date=2009|pages=271–74|isbn=9780080557830|url=https://books.google.com/books?id=_29tNNeQKeMC&q=Protolepidodendrales}}</ref>
