Description of the female of Heteragrion lencionii Vilela, Farias & Santos, 2021 (Odonata: Heteragrionidae), from Northeastern Brazil, with some ecological notes.

Group A of the genus Heteragrion Selys, 1862 comprises 34 species, of which 19 have complete descriptions of females. The aim of this study was to describe the female Heteragrion lencionii Vilela, Farias & Santos, 2021 based on three specimens collected at the Federal Institute of Sergipe (Brazil, Sergipe, São Cristóvão, -10.9198, -37.1862, 30 m asl, A.B.S. Farias leg., UFS), including mating specimens. Here, we provide a detailed diagnosis and illustrations of the female, and compare it with its closest congeners. Heteragrion lencionii female is distinguished from others by the shape of the intersternite, shape of the posterior lobe of the prothorax, and coloration of the head. The distribution extensions are relevant because the species has not been recorded from the type locality since its original description.