Diagnosis: Solitary canopy palm with dense, prickly stilt roots, pinnate leaves, leaflets in several planes and shaped like fish tails- broadening from base to apex, which is cut away at an angle to the main veins.
Local Distribution: Atlantic slope from lowlands to about 1000 m.
Diversity: 1 species (Iriartea deltoidea).
Comments: Reaches higher elevations than Socratea exorrhiza, which in our area has not been seen as high as 700 m. Socratea is smaller in height and diameter, with fewer roots, and the root spines are sharper. The terminal leaflet is bifid in Socratea and undivided in Iriartea.