Statistical treatment of palynological data from Rio da Batateira and Santana formations (Aptian-Albian) of the Araripe Basin provides mathematical support to paleoclimatic interpretations. In addition to Classopollis and ephedroid pollen. widely accepted as aridity indicators. other typical xerophytic elements include Afropollis spp. https://www.aitsglobal.com/product-category/%d7%a1%d7%a4%d7%a8%d7%99%d7%9d/