Resumen de Food items of larvae of Rimanella arcana (Needham, 1933) (Odonata: Amphipterygidae) in Central Amazonia, Brazil

Sebastião José de Oliveira, Neusa Hamada

• The objective of the present study was to determine the prey of R. arcana larvae by means of stomach content analyses. A total of 39 larvae were dissected; three of them (7.7%) had empty stomachs. The following taxa were present in the stomach content of R. arcana: Diptera: Simuliidae (83.3%), Chironomidae (61.1%), Empididae (5.6%); Trichoptera: Hydroptilidae (19.4%), Hydropsychidae (8.3%); Ephemeroptera: Baetidae (8.3%); Lepidoptera: Crambidae (2.8%) and Acarina (5.6%). Simuliidae and Chironomidae were the most frequent food items of R. arcana larvae, and both families also were the most abundant in the riffles and waterfalls of the study area.