BioStor
 | The Coryphoid Palms: Patterns of Variation and Evolution John Dransfield, I K Ferguson and Natalie W Uhl (1990) Annals of the Missouri Botanical Garden 77: 802-815 |
 | Studies in Neotropical Paleobotany. VIII. The Pliocene Communities of Panama-Introduction and Ferns, Gymnosperms, Angiosperms (Monocots) Alan Graham (1991) Annals of the Missouri Botanical Garden 78: 190-200 |
 | New species of Cyclanthaceae from southern Central America and northern South America B E Hammel (2003) Novon 13: 52-63 |