Archaeocycas and Phasmatocycas - new genera of Permian cycads
The generic names Archaeocycas and Phasmatocycas are introduced for two previously announced but unnamed new genera of Early Permian plants; these taxa are regarded as early stages in the cycadean lineage. The names arc formalized with diagnoses, illustrations, and type designations.
Journal of Research of the U.S. Geological Survey↗