Diagnosis: Solitary palms reaching 15 m tall, persistent petiole bases near top of trunk, spiny pinnately compound leaves with slender leaflets spreading above and below the rachis plane, fruit not spiny, in dry Pacific lowlands up to 800 m.
Local Distribution: Dry Pacific lowlands, rarely reaching 800 m elevation (Finca San Luis). Mainly seen in pastures and disturbed areas.
Diversity: 1 species (Acrocomia aculeata).
Comments: Cows eat the fruits and the seeds are considered edible for humans. A local wine called "Vino de coyol" is made by fermenting the sap.