Blue-eyed
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Rhionaeschna
blue-eyed darners, Neotropical Darners
Rhionaeschna is a genus of dragonflies in the family Aeshnidae, commonly known as blue-eyed darners or Neotropical darners. The genus contains approximately 42 species distributed across the Americas from southern Canada to southern Argentina, with the greatest diversity in the Neotropics. Notable exceptions to this range include a complete absence from the Amazon basin. The genus exhibits remarkable cytogenetic diversity, with multiple sex chromosome systems documented across species.