TL;DR: Four of five species within the family Lestidae in Numidia, northeastern Algeria, feature a prolonged pre-reproductive period approaching five or eight months and adults of all five species exhibit distinct spatial and/or temporal segregation.
Abstract: When comparing the phenology of species within the family Lestidae in Numidia, northeastern Algeria, we found that: (1) four of five species—Lestes barbarus, L. numidicus, L. viridis, and Sympecma fusca—feature a prolonged pre-reproductive period approaching five (Lestes spp.) or eight months (S. fusca); (2) adults of L. numidicus, and probably of S. fusca, move to upland refuge sites in summer, whereas those of L. barbarus and L. viridis aestivate in alder carrs in lowlands close to reproductive sites; and (3) adults of all five species exhibit distinct spatial and/or temporal segregation.
TL;DR: The morphometry of genital and non-genital characteristics and the morphology of the secondary genitalia, especially the ligula showed that two Chalcolestes species were the biggest in the most of the cases while Sympecma fusca and Lestes virens were the smallest.
Abstract: Lestidae is a heterogeneous family with more than 150 species worldwide. There are many debates concerning its resolution. One of them is whether the genus Chalcolestes should be recognized as a ge...