Diagnosis: Palm-like growth form, stems solitary, unbranched, leaves pinnate with 5-10 pairs of leaflets, petiole with short spines, leaflets with spine-like teeth on margen.
Local Distribution: Atlantic slope below 800 m.
Diversity: 1 species (Zamia neurophyllidia).
Comments: Three species of Zamia occur in Costa Rica, and a fourth is expected. The Zamiaceae is separate from the related cycad family Cycadaceae with two species of the genus Cycas cultivated in Costa Rica.