Taxonomical studies of dragonfly nymphs (Odonata, Libellulidae) by using their exuviae

Abstract

Taxonomic studies of dragonfly nymphs were done up to species level using their exuviae. Exuviae, being the last instar larval skin, possess all larval features. These features can be used for the identification of odonate nymphs up to species level. Seven species belonging to the family Libellulidae were identified using the features present on exuviae. This is a non-invasive method that can be used for the taxonomic studies of dragonfly nymphs without rearing them in the laboratory. The study describes the morphological features of seven species of dragonfly nymphs belonging to family Libellulidae using exuviae. A taxonomic key for the identified exuviae were also provided.