Soursop tree (Annona muricata) is a tropical fruit crop which cultivation is under an increasing development in the Northeastern part of Brazil. Fruit production is usually low due to deficient pollination. Severa! Annonaceae species are pollinated by coleoptera. Soursop flowers are visited by beetles Cyclocephala gravis Bates which feed upon two nourishing tissue areas found on the adaxial and basal portions o...