1. A fossil cyatheoid stem from Mount Elgon, East Africa;Bancroft;New Phytologist,1932
2. Cibotium oregonense: an Eocene tree-fern stem and petioles with internal structure;Barrington;American Journal of Botany,1983
3. Early Cretaceous fern foliage from President Head, Snow Island, Antarctica;Cantrill;Alcheringa,1998
4. A Cretaceous (Aptian) flora from President Head, Snow Island, Antarctica;Cantrill;Palaeontographica Abteilung B,2000
5. Aptian ferns with in situ spores from the South Shetland Islands, Antarctica;Césari;Review of Palaeobotany and Palynology,2006