; order Odonata, suborder Zygoptera)
Family of damselflies whose members have very slender, elongated abdomens, and are the largest extant odonates. The larvae inhabit a variety of habitats, including water-filled holes in rotting logs and branches of trees. The tracheal gills are often foliaceous. The family occurs in tropical rain forests, and 35 extant species have been described.
Subjects: Zoology and Animal Sciences.